Why is it hard to tell when the bar actually leaves the ground? Download the video as an MP4 and open it in QuickTime. Frame through it using the forward/back buttons. Start with this one, at 0:55 and 2:45
http://www.youtube.com/watch?v=BQZjC7cNbyE
This one is already slow enough to see: http://www.youtube.com/watch?v=gsXY7KxegAc