Saw a PC world delivery truck unattended last year. Living only 20 mins away by bus It would look normal for me to leave the area with a box with a tv in it or something.
So I run up to the truck, the driver is near the cab smoking, but the back is left open ??. I dont look at what I grab, just pick up a smallish box that I can run with, sprint off. Manage to get to the tram stop and hop on the tram (it goes in the opposite direction to home but I am not bothered at this point.)
I get off one stop later and realise I have picked up a macbook!! So I get off at the next stop and chuck it in the bin.
This all happened when I was 16 though, If I realised I stole a macbook now I would rather hand myself in than be caught running around with a mac.