Q: What do the Klingons do with the Klingon who replaces the bulb? A: Execute him for cowardice.
Q: How many Romulans does it take to screw in a light bulb? A: ONE HUNDRED FIFTY_ONE: One to screw the light bulb in, and 150 to self-destruct the ship out of disgrace.
Q: How many Vulcans does it take to screw in a light bulb? A: Approximately 1.00000000000000000000000000000000