This is why you can't trust anyone to work on your car.

Hey man, at least it wasn't worse. They could have not put oil in it. :D

That happened to my grandfather before... Oh wait, it was the drain plug they forgot. Well at least that's how I heard it. He took it to Wal-Mart, did some shopping while they changed his oil. He was driving home and his oil light turned on and it started ticking. He shut it off and looked under and the drain plug was gone. So he called there and told them to bring him a drain plug and fresh oil or when he got back he was gonna shove the car right up their ***. They tried to tell him they couldn't drive to him cuz that's not what they do. So he says,"alright bend over I'm on my way back!" And in less than 10 minutes someone had an oil plug and fresh oil brought to him on the side of the road. Man, I would hate to be the guy who had to deliver it to him. My grandfather is quite the Asshole. But they had it coming lol.