Among the first things student pilots learn is the importance of a thorough walkaround and a California man now has plenty of time to ponder the wisdom of that precaution. Police in Compton, Calif., allege that Troy Long, of Bellflower, described as a “former student pilot,” pulled a gun on staff at the Compton/Woodley Airport when they discovered him taking keys from the hook. They say he then bolted for a Cessna 152 parked outside. As staff called the authorities, Long started the aircraft and made good his escape — except for one thing. He didn’t unhook the chain holding the tail to the concrete.