thats not good; that thing was movin real fast too, he was trying to stop that thing the whole time, you can see him leaning far to his left trying to stop it, and then once it moves out of the way you see him on the ground not moving
Thats totally different deggis. In the first video its funny as the car hits the wall and he falls over - thats it. In the video you posted he gets hit and squashed between the cars and (i dont know though) probably died looking at it, if not seriously injured.
So marshall falling over maybe a few scrapes, cute or buises verses a marshall being hit by a car serously injured or possible dead.
Edit: i didnt watch it all the first time but seeing the drivers reaction i guess the marshall died.
I can't see that video, but I can guess it's probably Tom Pryce's accident (or similar) which is obviously totally different from the first fairly amusing clip.
And it's not Pryce's accident... it happened in Kyalami '77. This is from Belgian GP 1981. As I said this mechanic luckily survived but it was a black weekened anyway because another mechanic died in a similar accident: http://www.grandprix.com/gpe/rr347.html