I managed to knock someone's outboard off a bracket on their pushpit whilst getting caught out in an unfamiliar marina with both wind and tide in the same direction.
It was embarrassing for me, but thankfully the damage was limited to the bracket on a decrepit 2hp mariner outboard. The owner of the outboard was quite happy with the accident because i had to replace his outboard with a brand new one to replace the 20 year old one that got fished out by grappling hook the following day