Answer:
How do you blink twice without blinking twice?
What was the longest river in the world before the Amazon River was discovered?
What man can shave 10 times a day and still have a beard?
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 can you throw a ball 20 meters, and have it come back to you without hitting anything?
What goes around and around the wood, but never goes into the wood?