A man had a a fire in his house...

A man had a a fire in his house...

He got out the first time with his Son.
Then he returned and got out again with his daughter.
Then he returned the second time with his wife.
Then he returned the third and the fourth time without anyone.
People asked him : "What were doing?"
He replied : "I was flipping my mother-in-law on her back and chest.
Anyone got BBQ sauce?"