How does one leave a bike on someone else's yard? Chances are, it is a neighbor's kid's bike. Do you have neighbors? Did you ask around the neighborhood or are you one of those neighbors that really don't associate much with anyone. Are you the one they will be talking about on the news and be described as "a loner, didn't bother anybody and he pretty much kept to himself!"?

You don't know how long it's been on your yard...you don't get out of your house much?

Or, did you use a can of computer duster to break its lock