What's the worst vehicle that has tried to race you?

Sometimes I get random vehicles pull up beside me and I guess they want to race. I had a turbo diesel ford truck beside me the other night and as the road was about to split off he floored it. I didn't know we were racing? I also had a '00 Escalade want to race I think. I drove by him on the hwy not to fast all the sudden i look over and he's flying past then slows down up the road.