The Bouncer
"roundhouse" kicking death? And no Chuck Norris mention?
Chuck demands tribute.
Sounds like my friend's brother. He was a huge martial arts enthusiast for the wrong reasons. He used to go to bars to bait people into fighting him by viciously insulting someone until they would push or hit him, and then he'd go Chuck Norris on them (he was careful to make sure they struck first). He eventually became a bouncer and about beat a harmless drunk to death one night. Got himself in a lot of trouble.