A cyclist was removed from World Naked Bike Ride after getting an erection.
The naked cycling event in Kent - where men and women all let it hang out for the day - saw one nude rider get "overexcited and aroused".
Witnesses say police led the man away after stunned participants watching the race noticed the issue.
One witness told the Cambridge News: "It's fair to say he was overexcited and got aroused. It looked like he was enjoying the event a bit too much."
In a response to complaints posted on Facebook, ride organiser Barry Freeman said: "We do not accept this behaviour and he was dealt with and removed before the ride started."