Lars Boom got a month out of racing when he was suspended by the UCI for punching Sport Vlaanderen-Baloise rider Preben Van Hecke during the Tour of Norway

Boom was disqualified from stage two of the race after video footage showed him lashing out at Sport Vlaanderen-Baloise rider Preben Van Hecke at the head of the peloton.

http://www.cyclingweekly.com/news/racing/uci-bans-lars-boom-for-one-month-for-punching-rival-rider-at-tour-of-norway-384907