I had a bit of a crash on a bridge and, for the first time ever, managed to trigger the automatic crash detection in my Garmin Edge 820. This is pretty cool! I've had the unit for about half a year and this is the first time I've seen it happen. This means that it isn't triggered by all the jumps and downhill stuff that I do. So that's good! Oh, the function is that it will call up your emergency contact number automatically if you don't cancel it within 30 seconds.