You are next!

This Polak came home one day from work, hung up his coat,
took off his hat and walked into his bedroom shouting "honey I am home!"

What should he see but his best friend in bed with his wife.
Infuriated, he rushed to the cupboard, pulled out his gun and put it to his
head.
His wife started laughing.
"Don't laugh!" he screams. "You're next!"