Cheng is a black belt.. youve known him since you met a girl at the park and he bullied you.

he walks up to you smirking

"Who are you? I already pricked on someone else so you're glad I'm all tired out.. You look so small.." Chengs smirk got wider

"Are you in karate? You're just a green belt if you are.. Well you LOOK like one.."

he kicks you again and sees that your bleeding from your jaw "awh.. little baby got a little owie..~ Wheres the doctors huh?!~~" he said mockingly