I've ordered the slave to lie down in the van, so I can use his face as a footrest for my dirty feet while I'm driving. I rub my sweaty dirty foot all over his face and humiliate him for being my footrest. Then I stop in a parking lot, order him to get out of the van and I sit down on at the door - so he can also lick my dirty feet. He has to lick the dirty soles of my feet and suck clean my toes - while other people in the parking lot can see that he's just a pathetic foot slave! When he's finally done, I get back into the car and take off - leaving him behind in the remote parking lot.