Quote Originally Posted by LS3_KID View Post
Rockets are not like jets, once they are fired up that is it, the thing goes till it runs out of gas or explodes, too many factors in there for danger.
You are thinking of solid rockets specifically. Liquid fueled rockets, like the ones used in all the drag cars I've ever seen, can be turned off at any time, simply shut off the fuel like any other combustion device. That's why they use them, would be pretty dumb to use something you can't shut off.