A physicist, an engineer and a programmer were in a car driving over a steep

alpine pass when the brakes failed. The car was getting faster and faster, they

were struggling to get round the corners and once or twice only the feeble crash

barrier saved them from crashing down the side of the mountain. They were sure

they were all going to die, when suddenly they spotted an escape lane. They pulled

into the escape lane, and came safely to a halt.

The physicist said "We need to model the friction in the brake pads and the

resultant temperature rise, see if we can work out why they failed".

The engineer said "I think I've got a few spanners in the back. I'll take a look

and see if I can work out what's wrong".

The programmer said "Why don't we get going again and see if it's reproducible?"