In the middle of writing a ticket the driver of the truck I stopped runs back to me and asks for a fire extinguisher because his truck started on fire. I sprayed a decent amount into the cab and a little in the vents. Caught before any damage was done. Then he started his truck again to be on his way, but he forgot that his A/C was still on full blast. He got a mouth full of whatever is in the fire extinguisher. I couldn't write a ticket after that.