* The baseball glove. "What do you want me to do?"
-->'''Chuckie:''' Why would you hump a baseball glove? Come on, that's my ''little league glove''.\\
'''Morgan:''' I didn't use the glove. I just used it for clean up.
* The last line in the film, after Will uses Maguire's line.
--> '''Will's Note'': '''Dear Sean, tell the professor sorry about the job. [[MeaningfulEcho I had to go see about a girl]].''
--> '''Sean''': [[{{Beat}} ...]]Son of a bitch. He stole my line.
* During a hug between the two:
--> '''Will''': Does this violate the patient-therapist relationship?
-->'''Sean''': Only if you grab my ass.
* Early in the film, Will shows up a pretentious grad student, getting Skylar's attention for the first time. Later, as he and his friends pass by the diner window where the other guy is trying to pull the same routine:
-->'''Will''': Do you like apples?
-->'''Grad student''': ...Yeah.
-->'''Will''': ''*slams the piece of paper with Skylar's phone number up to the window*'' I got her number. How do you like them apples?
* The entire conversation about Sean's wife farting. Not so much the content, but the actor's genuine reactions and you can't help but join in. Creator/RobinWilliams improvised the line.
** Watch closely and you can see the film jiggle a little; even the ''cameraman'' couldn't contain himself.
* Will's disbelief at Sean missing Game Six of the 1975 World Series[[note]]The game where Boston Red Sox catcher Carlton "Pudge" Fisk hit his famous extra inning home run[[/note]] to have a drink with his future wife:
-->'''Sean:''' You shoulda seen her. She was a stunner.\\
'''Will:''' I don't care if Helen of Troy walks in the room, that's game six! Oh my God! And who are these fuckin' friends of yours they let you get away with that?!
** At the end of the scene where Sean explains how he doesn't regret it because it gave him all of those years with his wife:
-->'''Will:''' Woulda been nice to catch that game, though.\\
'''Sean:''' I didn't know Pudge was gonna hit a homer!
* Will messing with the therapists before he meets Sean, from the "Do you find it hard to hide the fact that you're gay?" line to mocking a hypnotist by singing "Afternoon Delight" when he's supposed to be in a trance.
* What does Will think of the new car his friends give him for his birthday?
-->'''Will:''' This is like...it's the ugliest fucking car I've ever seen in my life!
* This line from Sean to Lambeau.
-->'''Sean''': It's not about you, you mathematical dick!