Hey I'm sure Gruesome's seen it but every now and then when a tank get killed it will start spinning ungodly fast and then get shot into the air as high as you could imagine, then come back down and the same thing happens again. The number of times it hops sometimes varies, but it's nuts. I've only seen it happen twice, once on Coagulation and it bounced maybe 10 times. The other time on Containment and I swear it bounced up and then when it came down it landed on another tank and when it landed on that tank(someone was in it) it shot horizontally across the level and then back up... really weird but I've seen it twice that I can recall maybe more, so I'm sure it's not all too rare, and I'm sure it wouldn't be hard for it to kill anyone when it smacks into them. The two times I can recall It was just luck it didn't touch anyone.

Also check this out
http://www.youtube.com/watch?v=1OHfUBZNZcY
I played that a few weeks ago. I joined a custom game and it happened to be that. Sometimes if it's not laggy you can see all the cars at once but usually a great deal of them are invisible. I know it's modding but it was fun as shit lol.