 Unfortunately, some classic Muppets have been canned over the years  for interesting reasons. Don Music, the piano player who would bang  his head against the piano in frustration, had to be discontinued  when kids at home started doing the same thing. Harvey Kneeslapper  was discontinued because his signature laugh was too much of a  strain on Frank Oz (qv)s vocal cords. Roosevelt Franklin,  arguably one of the first breakthrough Sesame Street Muppets, had to  go as he was considered to be a negative cultural stereotype (he was  the only African American Muppet at the time and was seen mostly in  detention after school). Some of these banned segments continued to  air on the Canadian version for some time after they were removed  from the US show.