History Tearjerker / FostersHomeForImaginaryFriends

---> '''Mac''': (finally turning around and [[SuddenlyShouting screaming]]) [[RageBreakingPoint I WAS NOWHERE, THEY'RE NOTHING AND I TOOK CARE OF IT!! '''[[BigWordShout HAPPY?!]]'''

* In general:

* In general: Mac's mom is always at work, [[DisappearedDad we never see his dad]], he's constantly tortured daily by his [[BigBrotherBully older brother]], it's implied that he doesn't have any friends at school and is a common target for bullies, his imaginary friend is a huge jerk yet he's so sweet that he still visits him every day.
* ''"[[TheWoobie Why everyone hurt Red?]]"''
** ''"Red kill flowers..."''
* Bloo and Mac having to split up in the pilot episode, especially after Mr. Herriman shamelessly breaks their spirits by telling Bloo to his face that Mac is never coming back. He's seen it a million times.
** Mac coming home from his first visit to Foster's after dropping off Bloo, with a handful of Coco's eggs. He just walks glumly back to his room while Terrence follows and [[BigBrotherBully repeatedly smacks him in the back of his head]].
---> '''Terrence''': Where were you, anyway, ''stupid''? What are those ''stupid'' eggs, ''stupid''?? Where's that ''stupid'' little blue friend of yours, ''stupid''? Mom told ya to get rid of him!! Ho-ho-hoo boy! If you didn't, you're gonna be so-
---> '''Mac''': (finally turning around and [[SuddenlyShouting screaming]]) I WAS NOWHERE AND THEY'RE NOTHING AND I TOOK CARE OF IT!! '''[[BigWordShout HAPPY?!]]'''
---> ''(Terrance looks at him, speechless, as Mac slams his bedroom door behind him)''.

* "Good Wilt Hunting" reveals Wilt's past. Wilt ran away from his kid when they lost a basketball game, and thought that he could never forgive him. Turns out, this hurt him more than anything, and the flashback scene at their reunion is heart-wrenching.

'''Kip''': ''(frowns angrily)'' I own you, kid. That contract you signed--that wasn't an acting contract. It was adoption papers. So, as your legal guardian, I say YOU CAN'T QUIT!\\

'''Kip''': "But I didn't wanna be adopted!" Well, [[JerkassHasAPoint you shouldn't have gone on television saying that you did!]] [[JerkassHasAPoint You]] ''[[JerkassHasAPoint asked]]'' [[JerkassHasAPoint for this!]] Now, you are gonna get into your little costume and you're gonna perform your live variety show for millions of TV viewers like we planned! '''''YA GOT THAT, PUNK?!'''''\\

* In "Who Let The Dogs In", when Eduardo says goodbye to the puppies and one of them snuggles into his arm before Frankie takes him away. The look on his face afterwards is heartbreaking.

* When the gang finds Frankie in "Destination Imagination" and tells them that they need her, Frankie immediately believes that they didn't come to rescue her, but that they missed the stuff she did for them. She angrily calls them out, telling them they're no better than Mr. Herriman and his constant demands.

* Frankie's backstory [[WordOfGod according to the Tweets made by Craig McCracken]]. Because Frankie's dad (who was also Madame Foster's son) was disillusioned over Imaginary Friends thanks to his experiences with Mr. Herriman, Frankie was never allowed to have or create one, and she was forced to get rid of the only one she actually got to create thanks to her dad. Her main reason for living with her grandma in Foster's Home instead of with her parents? So she could see that same Imaginary Friend she herself created again someday.
** Similarly, a trading card in the Foster's Home for Imaginary Friends Leapster game also revealed the reason for Bloo's creation and look. He looks the way he does because Mac was trying to remember his favorite blue baby blanket. The same baby blanket he was forced to get rid of ''when he was only three years old''.

---> '''Mac''': ''I DON'T LIKE YOU!'' ({{Beat}}) Don't you get it?! ''Nobody likes you!'' You're annoying and weird and you talk too much and Bloo's name is not Chester, Mr. Herriman is not a badger, that's not how you play checkers, and protein doesn't come from bananas, it comes from nuts, which you don't need to eat more of because you ''are'' nuts! You're chock ''full'' of nuts! You're so nuts, you drive ''ME'' nuts! (Jumps in Goo's face) Get it? [=GetitGetitGetitGetitGetitGetitGetitGetitGetitGetitGetitGetitGetitGetit=]?! Everybody thinks you're a nuisance and they all want you to just '''GO HOME!!!'''

* The episode that first introduced Goo. She spends most of the episode being loud, talkative, clumsy, and obnoxious, incessantly accidentally creating countless imaginary friends which became residents of the house, leading to the house getting overcrowded. Mac tries to get her to stop, but she is oblivious to the fact that she is causing problems. Eventually, the house gets so overcrowded, the main cast has to sleep in the bus and as everyone believes it's Mac who keeps letting her into Foster's and has a crush on her (in both cases, it's really Bloo), Frankie and Mr. Herriman sympathetically but firmly tell Mac that he is no longer allowed at Foster's because he "can't stop bringing Goo there". Even worse, the deal to keep Bloo from getting adopted by another kid will be broken if Mac doesn't stop her from coming. Then everyone gives Mac a sad look (except Bloo who gives an apologetic look, since ''he'' was really responsible.) The ultimatum is clear: either Goo goes or both Goo and Mac go and Bloo gets adopted. Mac then releases a shocking TheReasonYouSuckSpeech... which leads to Goo's eyes welling up with tears, and the girl just leaves to hide in one of the rooms. That's when Mac finds out Goo made him a gift: she fixed his backpack after accidentally tearing the straps earlier in the episode. Mac later finds Goo in a room crying, and she tearfully admits that the reason she creates so many imaginary friends is because she has no real friends. She then verbally abuses herself for being such an annoying screw-up. This leads to a SugarWiki/{{Heartwarming Moment|s}} when Mac takes back everything he said, apologizes, and comforts the poor girl, telling her that he likes her and appreciates her imagination and niceness. Goo then responds by giving Mac a big hug.