Hmm. Knock, Knock. Who's there? Your butt that's about to be kicked.
12 seconds sound clip from the Kung Pow! Enter the Fist movie soundboard.
You can hear this line at 00:20:53 in the DVD version of the movie.
Quote context
[...]
- The Chosen One trained, for part of him knew what lied ahead.
- Wow! I'll have some of whatever he's smokin'!
- The others soon warmed up to him and his friend.
- Hmm. Knock, Knock. Who's there? Your butt that's about to be kicked.
- Take a close look, 'cause I rule, baby!
- And who do you rule? The Large, Dark Nipple People?
- I rock and roll all day long, sweet Susie!
- Leap that wall if you're so great.
[...]