An engineer dies and reports to the Pearly Gates. St. Peter checks his dossier and says,
"Ah, your an engineer -- you're in the wrong place."
So the engineer reports to the gates of Hell and is let in. Soon dissatisfied with the level of comfort, he designs and builds improvements. After a while, they've got air conditioning, flush toilets, and escalators.

One day, God calls Satan and asks with a sneer,

"So, how's it going down there in hell?"
Satan replies,
"Hey, things are going great. We've got air conditioning, flush toilets, and escalators. There's no telling what this engineer is going to come up with next."
God replies,
"What? You've got an engineer? That's a mistake! Send him up here, or I'll sue!"
Satan laughs and answers,
"And just where are you going to get a lawyer?"