You shouldn't go on stage until it is your turn.
Jeff is a stand up comedian, waiting for Martin who is currently on stage to finish his performance.
Jeff wants to impress the crowd tonight by doing something attention getting.
Jeff spends the rest of Martin's set drawing a funny picture on his shirt, and once Martin is finished runs on stage wearing it.
Jeff runs behind Martin as Martin is talking and waves his arms around while making faces trying to get the crowd's attention.
Martin is delighted to see his fellow comedian impressing the crowd with his zany antics.
Martin is angered that Jeff is ruining his performance and attempts to attack Jeff.