I was (much like a few others) playing around in the 8-Bit raceway track and the little triangles at the beginning of the tunnel was causing quite a few problems for the bots. One of them clipped it a little too closely and it spun around, As it tried to correct itself it ended up just blocking the rest of the bots from getting past.
If the crashed bot moved forward the bot trying to get passed would turn right (getting back) and vice versa. It was pretty simple but also pretty funny.