Two years ago on August 9th, some local kids (just graduated from high school) were on high performance ATVs and raising hell in the field in front of their parents. One machine was a brand new Yamaha given as a graduation gift. The grass was a bit wet as they approached from opposite directions at high speed. Someone miscalculated and they hit head on. Result; two dead on impact and a younger brother, who was a passenger, badly injured. All witnessed by the parents. I live three miles from their homes and had seen them ripping up and down the paved roads around my place with extemely loud exhausts, and mentioned to my wife that these two were going to get killed. I figured it would happen in a collision with a car though. With these two Darwin Award winners gone the roads are a bit safer, amd a lot quieter. They may have been wearing helmets at the time of the accident but they would not have helped with a combined collision speed above 75mph.
I'm glad your daughter wasn't more severely injured and gained some wisdom, albeit the hard way.