At the end of the movie when Spock and Bones are converting the Torpedoe, they finish and shove it in the tube, and less than a second later Kirk fires it. Well according to the star fleet technical manual they would have been incinerated. You will have to read the technical manual to find out why (I don't want to type it all in here). basically they wouldn't have had time to clear the tube before the Exhaust hit them.