He told him to go home and blow into the exhaust pipe really hard, & all the dents would pop out.

So, Paddy went home, got down on his hands & knees & started blowing into his exhaust pipe. Nothing happened, so he blew a little harder, & still nothing happened.

Next thing Paddy’s wife, Maureen sees what he’s doing & asked, 'What are you doing Paddy?'

So, he told Maureen how the repairman had instructed him to blow into the exhaust pipe in order to get all the dents to pop out.

Maureen rolled her eyes & said, 'Uh, Patrick, to be sure, you’re such an idiot! You need to close up the windows first.'