Life is terrifically boring for young people in Saudi Arabia. It is made even more trying for them in the knowledge that not too far outside their borders, even in other Arab lands, there's a lot more freedom and room for personal expression and reasonable contact with members of the opposite sex.
The rich among them go abroad and drive nice cars that daddy buys for them and they have girlfriends and drink Black Label. The poor boys they do this crazy shit because it's all the kicks they get.