Accidentally lost the keys to my bicycle while shopping in Rotterdam. Had already lost the previous set of bicycle keys a while ago. Fortunately I placed my bicycle right in front of a bar so while I was sawing through my first lock (which took me forever), at least many people asked me what I was doing. Actually most people walking past except for the police. Apparently they thought that somebody with an iron saw sawing away at a bicycle lock was perfectly normal.
On the other hand, anybody taking over an hour to open my locks can't be a thief :-)