Helicopters DON'T just fall from the sky - What is "Mast Bumping"?

A Bell 206 tourist helicopter crashes into the Hudson river killing the CEO of Siemens. Why would a helicopter crash so suddenly? What can cause a helicopter to just fall from the sky? The footage of the helicopter float inflation is taken from the incredible Walter Colby. If you aren't already, please go check out his channel and subscribe. https://www.youtube.com/watch?v=frCxvNbeqkM NO AI was used in the making of this video.