The Friends TV show was perhaps NBC’s one of the most successful series, which went on from 1994 to 2004. The sitcom starred Hollywood’s finest actors as the main cast, but the guest roles also included some big names from the industry. Surprisingly a renowned movie star once freaked out while filming a guest appearance on the show.

Before he landed his role of Charlie Harper on the CBS sitcom, Two and a Half Men in 2003, the actor had a successful career in the movies. Charlie Sheen was well-versed in acting, but in front of a rolling camera, not a live audience. The difference was so huge that when he appeared for a cameo on Friends, he initially could not perform.

A fish out of the water: Charlie Sheen’s struggle with TV format

Charlie Sheen gained widespread recognition with his successful movies such as films such as Red Dawn...