What's the most idiotic thing that someone has done to you, on purpose, while you are cycling?

Here's a kick off (NOT the the most stupid but the most recent):

This morning, cycling up a quiet suburban road I saw a couple of electricians uncoiling a thin electrical cable across the road. One on my side of the road and the other about 100m further up on the other side.

I said the the closest one "leave it (the cable) down" and he smiled at me and knodded.

Just as I was about to cross the cable he pulled it up to try and whip me off the bike. I managed to stop, wasn't going too fast, and clip out... JUST.

He stood grinning like an idiot, very please with himself. BIG JOKE!

#$%%^&#$*$#$%^&!!!!!!!!