Somehow, the moments that most scream "these mutant ninja turtles are also teenagers" for me aren't the ones where they're fooling around with sports equipment, tossing water balloons at each other, or just being a bunch of goofballs in general.
No, it's the moments where we see them passed out on the floor, empty pizza boxes and soda cups scattered around them, absolutely and completely tuckered out after doing what they do best; being kids.