At the swimming pool when slow swimmers and women who don't want to get their hair wet swim in the fast lane. They then glare at you for splashing them or overtaking them on a regular basis
Car drivers who are totally unaware that they share the road with cyclists. Also motorists who park on drop crossings blocking footpaths so people in wheelchairs and mums with prams have to detour on to the road or grass verge to pass by
People who let their dogs chase cyclists, runners and wildlife
People who when they find out you teach/practice karate start chopping the air with their hands and making silly noises
TV planners who think we all want to watch crap on a Saturday evening
The, "get those knees up" brigade
People who when the find out you work for the NHS start telling you about their long long wait for an operation or how they can't get a dentist