An engineer died and stopped at the Pearly Gates. St. Peter looked over his chart and had bad news. "According to my records, you are not scheduled to be admitted to heaven. You go to the other place." The engineer was disappointed, but followed the path down, down, down, past the creaky iron gates to Lucifer's fiery abyss.
A couple weeks later, St. Peter found the missing log entry. The engineer was supposed to be in heaven after all! So he called Lucifer. "You know that engineer we sent you, that was a mistake. He's ours. You need to send him back."
But by this time, Lucifer was getting used to having an Engineer on staff. "Send him back? Are you nuts? You've got plenty of engineers up there. This is the first one I ever got. And since he got here, things have been improving rapidly. The gates no longer creak. Most of our heat is run into giant generators that power the air-conditioning, The remaining heat is run into hot tubs everywhere! We have cool water piped all throughout Hades! The network stays running! It's like heav--, I mean, it's great! Not only that, but the clocks now all read the right time; nothing is blinking 12:00, which drove me nuts! I'm going to keep him and there's nothing you can do about it!"
St. Peter was insistent, though. "If you don't sent him back, why, I'll sue. I promise you, I'll sue."
Lucifer laughed. "Sue? Don't be silly. Where are YOU going to find a lawyer?"