Still waiting to see the "saf'ri choolha" in action .... 
Sleeping in the car .... hahahaha .... I have lot of experience with that!!
My father was very strict about late coming home. At 9 pm, the guard used to handover the main gate keys to my father. Anyone coming home later than 9 pm had to sleep in the car. So many times it happened to me ...
He used to tap the car window when he went for namaz in the morning ,,,, "chalo ab andar chalay jao" .. nothing more, nothing less ... I must say it was fun if there was enough fuel in the car ... however, students' cars are usually low on fuel ... you know the deal