Q: How many Romulans does it take to screw in a ...
Q: How many Romulans does it take to screw in a light bulb?
A: 151, one to screw the light-bulb in, and 150 to self-destruct the ship out of disgrace. (Warning: do not tell this to Romulans or be ready for a fight. They consider this joke to be a disgrace, though it is not bad for a LBJ.)