On page 85 of Rupert Guinness's What a Ride: An Aussie Pursuit of the Tour de France he relates a story I'd heard about Sean Kelly's practical joking side: "In the peloton he was known as a practical joker, his favorite stunt being to scrape a soft drink can on the road while the peloton was riding. This raised the hairs on every rider's neck. It was the sound they feared most, a crash."