I didn't know it but it was obvious besides I had guessed a similar one a while ago, it wasn't the same one though
:cheers:
A man is driving slowly through a town. He is carrying two passengers, one in the front and one in the back. On arriving at their destination, where they meet up with four others, they all get out and it begins to rain. Six of them get wet, even though they hurry on their way. The passenger who was in the back of the car, however, remains completely dry, even though he makes no attempt to hurry. How is this possible?