The teacher asked the students to bring one electrical appliance for "Show & Tell," and the next day every kid had something. The teacher asks Wendy: What did you bring? Wendy: I brought a Walkman. Teacher: And what is it for? Wendy: You can listen to music with it! Teacher: That's nice Wendy, and what did you bring Kenny? Kenny: I brought a 'lectrical can opener, it opens cans! Teacher: Well done, Kenny, but I see Johnny didn't bring anything! Johnny: Yes, I did. It's in the hall. (The whole class looks out into the hall) Teacher: What Is That, Johnny? It's a heart/lung device they use it in hospitals to keep your heart going! Teacher: "And what did your father say about it?" Johnny: AAAAAAAAHHHHHHHHHHHHHHH!!!