Bobo & Johnny were in class on a monday
Johnny: I can make the teacher give me the day off.
Bobo: And how would you do that ?
Johnny: Just wait and see.
[Johnny hangs upside down from the ceiling]
Teacher looks up : eerhh ! Johnny, what's that ?
Johnny: I'm a light bulb.
Teacher: You're very tired, go home & rest for a week.
[So Johnny packs his bags.]
Bobo also begins to pack his bags & stands up to leave the class.
Teacher: errhh ! Bobo, where do you think you are going !
Bobo : I'm also going home. I can't study without light.