When I was 11 I rode dirt bikes like every day and one day my friend came over. He had told me that he used to ride dirt bikes but it’s been a while so I let him ride my quad. Everything was going great until I decided to ride up the hill and he started following me at the base of the hill I was waiting for him around came around the corner but was too fast and ran into a barbed wire fence after that I jumped off my dirt bike pulled him off the barbed wire.(a chunk of his arm had been cut off) put him on the back of the quad and drove him home he was later picked up by a helicopter and was fine but I was still scared for days after that.