Man… I really am a fan of Gai-sensei and Rock Lee… I think they’re just so funny and outrageous. It’s a nice contrast between the calm Kakashi. There’s also a contrast in intelligence, too… Gai kicking Jiraiya because he thought he was the enemy… OMG, I busted my gut over that. It was too hilarious!
Here’s a short clip of that scene, too: http://www.youtube.com/watch?v=PDOZ_hyu7Lo