All in all, this comic strip made my day.
No, I don't know how Keith did it. The guy explodes? Maybe Keith used a chi ball.
Karate does not have techniques that explode people into a million bits. It's possible that your friend knows the secret ancient Chinese martial art known as the 18 dragon subduing palms, thought to have been lost during the Ming dynasty. It is the most powerful offense oriented chi super art taught only to the elders of the old beggars' sect....
In order to do the exploding karate chop correctly you must have a cucumber inserted into your anus at all times. This is the only way to correctly cause the explosion.
Most of the people in general public society whether is government or mafia would say two or three things make sure you have a spouse is one make sure that guy follows the jurisdiction of the law or that it gets a certify in any martial art .
Sure it wasn't as judi chop instead? ...or maybe the ninji chop?
Here is the instructional:
My buddy Keith and I used to work together at a car shop. One day something actually tried to rob us and my buddy Keith karate chopped the guy that he literally exploded into a million little pieces. Later that day my buddy Keith got arrested for blowing the thief up, but before he got sent to prison I forgot to ask him how to do those awesome karate chops. So now I'm just wondering if anyone knows how my buddy Keith karate chopped that one guy???