Answer:
What always comes into a house through the keyhole?
What can I not be tomorrow?
A claustrophobic person gets on a train. The train enters a tunnel just as it is leaving the station. Where is the best place for him to sit?
How is it possible to always find what your looking for in the last place you look?
Two fathers and two sons are in a car, yet there are only three people in the car. How is this possible?
What never gets any wetter no matter how hard it rains?