You've probably seen this one, but for the record:

A priest, minister, and a rabbi (why is he needed in this joke?) were all on a plane with a group of kids. They were on their way to a religious camp-out when the plane's engine blew up and the plane was nose-diving to a crash.

The rabbi (there, I added him in) cried out, "There's only three parachutes! What about the kids?"

The minister yelled, "Fuck the kids," and grabs a parachute.

The priest asks, "Do we have time?"