As a schoolboy, “I was bored, understimulated,” says Republican presidential candidate Donald J. Trump. “I wanted an energy release.” He found it harassing his teachers, even punching one, though he’d rather talk about throwing chalk at blackboards when they’d turned their backs. “It used to explode if you’d throw it hard,” he recounts with glee in My Generation, now available as an e-book for the first time. @realDonaldTrump #Trump2016 #DonaldTrump #babyboomer