Three engineers were arguing about what kind of engineer God is.

Electrical engineer: "surely God is an electrical engineer, the brain and nerves are a symphony of exquisite circuitry."

Mechanical engineer: "no, look at the ballet between bone, muscle and sinew. God must be a mechanical engineer."

Civil engineer: "God is a civil engineer. Who else would run a toxic waste pipe right through a recreational area."

(the joke is by Robin Williams, I think)