If you watch the doc that's on Vimeo about this thing they sampled a lot of data themselves by actually simulating normal riding situations and then also situat

If you watch the doc that's on Vimeo about this thing they sampled a lot of data themselves by actually simulating normal riding situations and then also situations where they would crash in different ways. I'm assuming they used some accelerometers and other recording devices and then designed something that discerns a crash situation from a normal bike riding situation