I like the subtle kakashi humour in naruto....
When naruto gets diarhea from the milk, we see Kakashi in his house later on, and he just observes "hmm, his milk is bad." hahaha that made me laugh....
also, whaen Naruto finishes in the prelims, we think he's finally learning about himself, and he goes to the hospital... he asks to see Sasuke and they tell him no, and he starts freakin out, and then from down the hall you just hear
"Naruto! Be quiet in the hospital." haha i don't know why, that made me laugh. I guess cause no matter what, kakashi will always be a teacher to naruto, it's funny.