Man uses car window to express extreme dissatisfaction with car purchase.
Since you can kind of assume you're being lied to just by virtue of the fact that someone is selling you a car, these must have been some pretty exceptional lies to inspire such hatred. Was it a "They've got my son and he'll die unless you buy this minivan" kind of lie? Or a "This is so not the blandest automobile ever seen on the road and you won't age ten years just by getting behind the wheel" kind of lie? Probably the "they've got my son" thing since that's way more believable.