A drunken student is showing girl he picked up around his flat, after going thorugh the house the girl notices theres a giant gong and a mallet in one of the rooms. She asks "whats the deal with the gong?"

He replies with "thats not a gong, its a talking clock", she is amazed and asks how it works, the man procedes to whack the the gong with the mallet, the two of them stood looking at one another for a moment.

Suddenly, someone on the other side of the wall screamed,
'HEY MAN, it's three fifteen in the bloody morning"