there was a mattress, yes a whole mattress, on the roof of my van, fairly carefully placed too.
I was working on a site a little while back when one day, the site agent parked his car on the site next to a part-built building with scaffolding. So I carefully placed two bricks on the bonnet of his car laid on perfectly cut pieces of thin polystyrene. I then placed a few more bricks on the ground next to his car. Of course when came out of his office and saw it he immediately thought that some bricks had fallen off the scaffolding onto his car. He was alright about it, and in fact thanked me for ensuring that I had placed polystyrene under the bricks !
On the same site, I placed a empty parking ticket envelope on the senior contracts manager's car which he had parked illegally outside the site gates, inside I put a note saying "next time it will be for real" ! That one took a bit more guts because the geezer was a right **** and could have easily spotted me doing it. When I went outside after he had gone I found it screwed up on the floor - the humourless ****.
Many years ago on a different site, someone once sellotaped a condom to my car windscreen with a note saying "you're sacked, so you'll be needing this as you won't be able to afford kids without a job" !
And on yet another site ....... a mate of my managed to somehow, slip through a gap in the window, about 3 gay porn mags face up onto the back parcel shelf of my car. They were clearly on display all day in the car (which everybody knew was mine) until I went to go home at the end of the day. Bashturd.
BTW, you have my sympathy alwyn - can't believe anyone did that 'just for fun' 
Although are you sure that you are ' possibly the most angry you have ever been in your life' ?
