In the middle of a flight one day in 1974, Led Zeppelin drummer John Bonham got drunk and lazy -- so lazy that, rather than pay a trip to the lavatory, he simply peed in his first-class seat.
Some time later, beginning to feel some wet regret, Bonham walked back to economy class and offered his seat to a roadie. "That's bloody nice of you," the unsuspecting man declared, heading toward the front of the plane. "That's just wonderful..."
[On another occasion, Bonham grew annoyed with Jimmy Page's Japanese girlfriend -- and pooped in her purse.]