Why does the brake smell ?

A young girl (18ish) walks into a prestige car sales room. Looks around at all the Porsches, Lamborghini's, Jags etc., and says to the salesman "can I have the red one?" - a top of the range Porsche. " I'll pay cash!" and starts taking handfuls of tenners out of a carrier bag until she gets to the right price.

The deal is finalized very quickly and the girl drives it away. She is back 2 days later - "I want my money back...it smell awfully bad when I use the brakes" she states emphatically. Not wanting to lose the sale (having taken cash and fiddled the books) the manager decides to ride in the car with her 'in case she is not
driving it properly'

He gets in and she roars out of the dealership, drops it into second gear at 55 mph, floors the pedal again and slips into 3rd at 80 mph does a handbrake turn into a country lane and then really starts to accelerate.

120 mph into 4th gear; 5th at 145 mph. The engine is screaming, trying to leap out of the bonnet when it reaches 170 mph. The scenery is a green blur the G-force has him pinned in the seat. In the distance, to his relief, the barriers of a level crossing are beginning to come down and she will have to slow down (he thinks!) instead the
pitch of the engine increases.

100 yards from the crossing she slams on the brakes and the car stops inches from the barrier. "Can you smell it?" she says.

"SMELL IT? I'M SITTING IN IT!"