An American actor and stuntman, J.J. Cohen is a familiar face from 1980s youth cinema, often cast as a member of the bully's gang. He appeared alongside Biff's henchmen in 'Back to the Future' (1985) and its sequel 'Back to the Future Part II' (1989), and turned up in other teen and action films of the era. Working frequently as both actor and stunt performer, he built a durable behind-the-scenes career in Hollywood, a dependable presence in supporting and physical roles.