The Talking Clock

While proudly showing off his new apartment to friends, a college student led the way into the den.

- What is the big brass gong and hammer for? - one of his friends asked.

- That is the talking clock, - the man replied.

- How's it work? - the friend asked.

- Watch, - the student said then proceeded to give the gong an ear shattering pound with the hammer.

Suddenly someone screamed from the other side of the wall:

- KNOCK IT OFF, YOU JERK! It's two AM!