how to punish boyfriend?

so my bf decided to ride the 4 wheeler and be cocky with it after he watched videos of other people jumping . the result of him trying to jump like the others on the youtube !! ended up with a gash in his ankle . before he went off and hurt himself i told him dont be cocky on my 4 wheeler,but no he did it any way . so im thinking of a punishment for him because he scared me to death ! i was thinking no riding the 4 wheeler anymore. what would you do ? put yourself in my shoes