Noise Under Bed

All the fraternity brothers left the house for a long weekend except for Grady, who decided to stay behind and get some studying done.

One night Grady heard a noise under his bed.

Fearing it might be a burglar, he leaned over and whispered:

- Anybody there?

- No - said the burglar.

- That's funny - the boy said to himself.

- I could have sworn I heard a noise!