An Arab's royal son goes to Germany to study.
A month later, he sends a letter to his dad saying: " Berlin is wonderful. The people are nice and I really like it here, but I'm a bit ashamed to arrive school in my Mercedes SLR McLaren, when all my teachers travel by train."
Sometime later he gets a letter from his dad with a hundred million dollar cheque saying:
"Stop embarrassing us, go and buy yourself a train too!"