My intention with my following comment is not meant to offend, but I can't agree with anyone that calls the spectators that were killed dumb or idiots. Those comments are a little off base in my opinion.
To be dumb means you know better and do something stupid anyway. Most of us in this sport have been educated on the danger of being around a strap or cable under tension. That is all thanks to the country we live in, the sport we enjoy, and being somewhat educated in these things. I am fairly certain that video wasn't shot in the grand USA. I imagine the event had nowhere near the safety emphasis we see in events we attend (that are well organized anyway).
wheelewagon admits to being a Marine and has been trained to do recovery safely. If he were there, standing that close to the vehicles in that situation, he would be dumb or an idiot because he has been educated on the danger and risk. But to call the unfortunate souls that lost their lives anything other than tragic casualties, is very misguided in my book.
Everyone is entitled to their own opinion, and I personally don't see any humor or amusement in the tragic incident, but if others do, that is their choice. However, it does sadden me to see society stoop to that level of disregard for human life, and lack of compassion for others.
Teach your family, friends, and wheeling partners of the risks of not doing proper recovery, and maybe you can prevent this type of tragedy from becoming very, very personal.