It would make merging on the interstate easier...

The Navy is experimenting with new electromagnetic catapults that can hurl a plane off a carrier. The acceleration is 0 to 150 mph in under a second - which is why I used the verb "hurl".

The limiting factor is going to be the poor dude in the cockpit. Keeping in mind the brain is about the consistency of week-old pudding, 14 G's could be a pretty hard on even the toughest airman.