[Lemmy]

The truck driver is sitting at a red light. The blonde in the lane
next to him is motioning for him to roll down his window. It's a
cold day, so he rolls down the window reluctantly. The blonde
says: "Hey, mister truck driver.... you're losing part of your
load!"

The truck driver ignores her, rolls up his window and drives away.
Pretty soon, he stops a another red light and the blonde catches
up to him again.
She again motions for him to roll down his window, but he ignores
her until she starts blowing her horn.

Finally, he rolls down his window and says, "What do you want now?"

The blonde replies, "I told you, you're losing part of your load!!"

The trucker rolls up his window and pulls away from the light.
Sure enough, he catches the next light red, too. This time the
blonde jumps out, runs around her car and pounds on his door,
yelling "Don't you care that you're losing your load???"

The trucker rolls down his window and says, "Fer Pete's sake lady,
it's a SALT TRUCK!"