Sounds like a story that needs repeating...
he and i were swapping the body on my blazer and having trouble getting the frame low enough to get under the body which i had suspended at maximum height. we decided to pull the tires off of the frame and roll it the last few inches on floor jacks. we didn't have floor jacks tall enough to lift from the axle, so i put a high lift under the front bumper so we could do both tires at once. this was a very bad idea. the garage i had at the time was not very wide, and jonathon had just pulled off all the lugs and was just about to pull the tire when the frame swayed to his side and the highlift fell, i was yelling for him to move, but the space was so limited that he couldn't get out quick enough and got pinned between the bumper and the wall of the garage. another friend and i quickly yanked the frame away and he got out with no more than a few scratches on his back.
scared the sh1t out of us. when using a highlift, never lift from the front or rear - just from the sides of the truck. as far as i'm concerned, it's the safest way to go.