Turtles Forever/Funny

"1987 Don: Huh... that should have worked. 2003 Don: Should have worked!? That's not a trans-dimensional portal stick, that's... a flashlight."
 * 1987 Donatello turning a flashlight into a Dimensional Transport Stick,
 * The best part of that sequence might be 2003 Don's reaction to the building process. Consider:

"1987 Don: Science isn't all about facts, you know. Now hand me that hammer. 2003 Don: This... is a wrench."
 * and

"Leonardo: Uh... so, how do you guys normally handle these situations? 1987 Turtles: Turtle Power! Michelangelo: Don't ya just love these guys? Cowabunga! *joins along with the 1987 Turtles* 1987 Turtles: Cowabunga! Raphael: *moans* Geez, it's like having Five Mikeys now!"
 * They actually form a very effective Straight Man and Wise Guy team.
 * Hun can't understand the concept of the Fourth Wall, "Why do you keep doing that?! Who are you talking to?! There's no one there!"
 * Mikey and the 1980's turtles battle cries.

"87 Mikey: Cool off dude. 03 Mikey: Cool off he says."
 * How about people being attacked by a giant walking-talking banana. That's right a giant BANANA, I know... weird.
 * The two Mikey's in battle.

""Your doubles ain't exactly playin' with a full deck, are they?""
 * One of the cut scenes features the two teams (mostly just Raphael on the 2003 team's part) arguing about which Shredder caused the problem in the first place. Casey and April's expressions say everything that needs to be said, topped with this line from Casey:

"87 Leo: But first, we have to save April! 87 Don: We save April at least once a day."
 * This is funny in itself, given that 1987 Casey was essentially Harry Callahan in hockey gear.
 * The 87 Turtles upon returning to their dimension.

"Leo-Prime: (narrating) I strike two on my way down. Donatello takes out a third with his staff. Already, the pudgy ones are starting to panic. Raph loves this stuff. He's not alone. 03 Don: Why is he narrating? Is he crazy? 03 Mikey: Hardcore crazy. 03 Raph: I love these guys!"
 * "Wait! Come back with my command chair!"
 * The 87 & 03 Turtles get rid of Shredder-Prime... By pelting him with rubbish & knocking him off the rooftop they were on.
 * In the first appearance of the Turtles-Prime, while they're attacking their inter-dimensional counterparts, we get this exchange: