This is the University Dormitory Parking lot behind my house, where apparently they use this improvised 'Denver boot' to immobilise an illegally parked car. I suppose what I like most about this is the sense of immediate, personal reaction; in my experience, people in America would rather call the tow truck and hide behind the anonymous (and ugly) facade of the tow truck company and the aggressive demeanor of the truck driver. But this, this is up close and personal; and most likely the driver of this car will learn their lesson without having to pay an arm and a leg.