一个笑话 求解释 how many hitmen does it take to screw in a ligihtbulb?

问题描述:

一个笑话 求解释 how many hitmen does it take to screw in a ligihtbulb?
how many hitmen does it take to screw in a ligihtbulb?
答案是: two. one to do the job, and the other to kill the witnesses.
不明白 可笑么..?

冷笑话啊~