A very tired nurse walks into a bank,
 

A very tired nurse walks into a bank,

Totally exhausted after an 18-hour shift.

Preparing to write a check,

She pulls a rectal thermometer out of her purse

And tries to write with it.

When she realizes her mistake,

She looks at the flabbergasted teller

And without missing a beat, she says:

'Well, that's great....that's just great....

Some asshole's got my pen!'

That's a groaner.