My motorbike was stolen the 12hrs before I went sitting in a hedge in a field where I found some tyre tracks in some mud (nobody sensible would have a trials tire on a chicken chaser) of my bike earlier that day ( skipped classes at my EE uni course). After ~4hrs sitting in the cold and dark I hear the bike near to the field and set after it and try to pull the thief off as he goes around a roundabout (he just wobbled into the curb and goes off and I get flung to the ground). I phone the police telling them where my bike is ( I had reported the theft hours ago). I chase after the guy and he drops it somewhere (it went quiet) so I phone for my housemates only for 1 to drive home because he "doesn't like this one bit". I spent 20minutes waiting for the police only for me and a friend to fail at tackling the guy off the bike when he comes back and rides off.
I go looking for the bike with a friend (I hear it stop a long way off somewhere in a council estate) and interrogate one of the thief's friend who tried to follow the thief. Waste of time, it turned out the friend had put fake plates on his scooter. My friend miraculously spots my bike in a dark alley and we push it home. Then 3 fucking police cars turn up almost an hour after I tell them and I convince them I phoned them but I have nothing on me (I was certain I was at least going to get beaten up that night) so I get put in the cop car and taken home to get ID. Then they are happy that I wasn't the thief.
That was the 2nd time my bike got stolen.
1st time it was in a locked garage blocked by a locked car (smashed the window of the car to release handbrake and crowbarred the garage door and cut the lock. A few years later they torched the both and my bike along with my stuff stored in it [i was at uni]). Usual stuff first, police come down, take info and tell me they wont be able to find it. I bunk off school and go riding around on my mountainbike checking out all the council estates and woods near my home (Plymouth, England). Sure enough I hear it come down a path and see 2 people on it. I throw my mountainbike in front of them and they came crashing down and I banzai charge at them screaming. One of them runs for his life and the other just hung around claiming he didn't nick it (was offered a "go") and wanted compensation for damaging his "trackies". I believe him though as I had an inkling as to who knicked it. I ride out of the woods away from home with the mangled bicycle on my lap and I get my dad to come by to pick it up(http://www.flickr.com/photos/jonnobleuk/5783020123/), clear the woods between me and home and then I ride back. Police's response when I tell them I retrieved my bike back "oh, good for you."
For some unknown reason this heap of a bike got stolen 3 times. The 3rd time I gave up only for the police find it dragged 50meters away from my home where someone tried to use bolt-cutters on it. The police then tried to charge me £250 for retrieval fees. I slipped off from work to avoid that scam.