A physicist, a mathematician and an enginner were sharing a hotel while they were at a conference. One night, a fire broke out in the hotel.
The mathematician was the first to wake up. He went out to the hall, and saw the fire. He thought about it for a few moment, and said "I have the solution!" and went back to bed.
The physicist woke up next. He went out to the hallway, and saw the fire. He thought about it for a few moment, and said "I have the solution!". He woke up the engineer and told him what to do.
I hate engineers.