You may think that the fact that our city's bendy buses can't reverse isn't too much of a problem, it's the going forward bit that we're interested in. It isn't a problem really, until one attempts an overambitious right turn and hits a bus stop. We'll let the pictures do the talking, but the result is basically the longest public transport traffic jam ever, a police presence akin to a riot response and smug looks on the faces of cyclists. Unfortunately, we don't know how the situation was resolved, your guess is as good as ours.
This debacle took place on Rosebery Avenue in EC1, pictures thanks to Peter Kail.