To kinda end the off topic discussion in here, Yes technology has advanced very far since Dennis got hurt, so getting hurt in a monster it pretty hard to do, but can happen as with anything else, if you push the limits, you can get hurt doing so. And just to add, ever though safety is there and technology is there, jumping any kinda of vehicle, has a long term effect on the body no matter what.
And now back to Max-d, what tom did made me have to rewind the video just to make sure i saw it right, and was simply breath taking.