Jack up a car, change four tires, fill the gas tank, check the oil, wipe the windows and get back on the road. Oh yes, and you've got 17 seconds to do that or you're fired. Who could handle a job like that?
Drag racing is over in less than 10 seconds and reaches terrifying land speeds. Pit crews work continuously throughout the day and they know that a single mistake will not only end the day, but will endanger the driver.