A doctor, a priest and an engineer are all playing golf, when they find themselves stuck behind a really slow-moving group. They call the groundskeeper to complain. "I've never seen such inept golf," they tell him, "Can you do something?"
The groundskeeper replies, "I'm sorry for the inconvenience, I hope you understand; those are three firefighters who lost their eyesight while saving the clubhouse."
This causes a short awkward pause in the group. Finally the doctor speaks up.
"That's just awful, I'm going to talk to some of my colleagues in optometry and see if there's anything I can do to help."
The priest adds: "I feel just terrible, I'm going to talk to my congregation and see if I can't get a collection together for them."
Finally the engineer speaks up and says, "Why can't they just play at night?"
EDIT: Also, What's the difference between mechanical and civil engineers? Mechanical engineers build weapons. Civil engineers build targets.