Nice video.
I love how during that last wreck starting at about 6:40 most of the riders take the time to hold their arms up in disgust as if they're waiting for someone to give them a "sorry you hit an oil patch on turn 5" Hallmark card.
I think they wanted to know where the hell the oil flag was.
There's a great video of Colin Edwards in a WSBK race at Phillip Island where he grabs the oil flag and waves it himself after he and several others crashed.