I bet he did the classic fail which you see on motorcycles where he did not realize the torque of the acceleration when he hit the throttle and fell backwards hard.
Dirty Harry (Magnum Force): “A Man’s got to know his limitations...”
Yep - common rookie mistake.
Years ago, a friend bought a Kawasaki 900 and it was sprinkling when he went to pick it up.
Knowing he was a novice, the shop tried to get him to wait for nicer weather but he insisted...
As he started to pull out of the parking lot, turning/leaning a tad to the right, he gave it a little goose and spun out right there...not 200 feet on the bike and it was scraped up real good - along with his leg and elbow...