Paddy was on a flight when the captain came on the tannoy.

"I'm sorry to say that an engine has failed so we will be an hour late".

A little later on the captain came back on the tannoy.

"Another engine has failed so we will be two hours late".

Again, the captain came back on the tannoy.

"Another engine has failed so we will be four hours late".

Paddy turns to the passenger next to him and says.

"I hope the last engine doesn't fail otherwise we will be up here all night".....