The whole "Darren Thorne's Pro Ping-Pong" Running Gag hidden inside the earlier titles. THUG Pro then brings back said gag as a billboard advertisement for a game, being sold at GameScam.
Canada in Pro Skater 3 has a goal in which you have to "Get Chuck Unstuck". "Chuck" is a child whose tongue is stuck to a pole, while being endlessly harassed by bullies. The solution? Grind on his tongue. Afterwards, he goes running around, holding his tongue in pain.
The song "Drunken Lullabies" turns just about any mission in Pro Skater 4 into a CMoF, especially Bam Margera's Pro Challenge.
Jamie Thomas' excited noises while performing specials in Pro Skater 4 can make anyone chuckle.
The scene in THUG where Bam is mesmerized by the Russian tanks.
Bam: Mmmmm, tanks... Aww, tank—look at these tanks. Damn, look at these tanks.
And then, after Sparrow apologizes to you, and Todd orders the both of you to get going:
Bam: It's sooo good... We can't go skating right now, look at these tanks! Damn!
Every scene in THUG2 with Paulie "Wheels of Fury" Ryan.
"Oh, you want some of me? [spins around and hits you in the knee] BRING IT ON, BITCH!!"
"Please keep all hands and feet inside the port-a-potty as you... TAKE A DRINK, BITCH!!"
Bam: Like that: 50 points if you can get someone to hose their pants. [close-up of Sparrow's crotch, soaked in urine] Sparrow: Come on, that's sweat! Bam: Whooo...and 20 points if there's any luggage in the trunk. [you back your chair away from Sparrow] Sparrow: What? I had a fruit salad, all right?
Eric Sparrow attempting to do a trick off a high ledge, only to crash into a wiener cart instead.
Sparrow: Check me out! I'm goin' BIG! OH SH—[bleep]!! Mike V: Dude, could he suck any more? Muska: Yo, it's kind of ironic, man. [picks up a wiener and waves it in front of Mike] Him nailing a wiener cart...get it?
At the end of THUG2, Nigel Beaverhausen being given what he believes to be the World Destruction Tour highlight tape. What he ends up getting is Phil Margera defecating, yelling to his wife that there's no more toilet paper, and then proceeding to wipe with a towel. Nigel's reaction is priceless. And the best part? This was on live television.
Tony: Thank you, world, for tuning in! But before we go, we'd like to leave you with one little thing... [Bam sneaks in and pulls down Nigel's pants, as Nigel emits a high-pitched shriek]
In American Wasteland, on your first ride around Hollywood, your final objective is to make combos big enough to bring down the dinosaur prop at the top of an abandoned museum. When you do, the dino falls on the street right over a speeding bus that proceeds to rip its head off and drive on with it straight into an Animal Wrongs Group of protesters... The best part is when the dino's head crashes into one of the hapless protesters, mouth-first:
Mindy:Holy sheep! I guess this proves that T-Rex was a carnivore.
The many bail messages if you ran into potential hazardous areas or in some secret parts:
"Don't build this at home!"
"Don't do drugs!"
"No free skates!"
"Serve, set, spike!"
"Who built that?!"
If you select Officer Dick in 1+2, you get to see him use his skateboard like a guitar, complete with a guitar riff.
Rodney Mullen's bonus outfit in 1+2 is the brightly colored shirt and tight shorts getup he's wearing in a famous video of him from a freestyle competition in the mid 80s, complete with the relevant 80s hair. What makes it hilarious is that this is that he's not de-aged for this outfit at all, so it just looks like a 53 year old Rodney having a mid life crisis.
The Neversoft logo for Project 8 begins as Nightmare Fuel like many of their other logos, but it quickly turns into Nightmare Retardant when the alien picks up a skateboard, and begins dancing to "Chase the Devil" as disco lights shine down.