An engineer dies and reports to the Pearly Gates.

Saint
Peter checks his dossier and not seeing his name there,
accidentally sends him to Hell. It doesn't take long
before the engineer becomes rather dissatisfied with the
level of comfort in Hell.
He soon begins to design and build improvements.
Shortly thereafter, Hell has air conditioning, flush toilets
and escalators. Needless to say, the engineer is a pretty
popular guy.
One day, God calls Satan and says: "So, how are
things in Hell?"
Satan replies: "Hey, things are going great. We've got
air conditioning, flush toilets, and escalators. And there's
no telling what this engineer is going to come up with
next."
"What!" God exclaims: "You've got an engineer?
That's a mistake - he should never have been sent to
Hell. Send him to me."
"Not a chance," Satan replies: "I like having an
engineer on the staff, and I'm keeping him!"
God insists: "Send him back or I'll sue."
Satan laughs uproariously and answers: "Yeah, right.
And where are you going to get a lawyer?