Larry Vincent
Larry Vincent was an American television horror host, famed for his character Seymour, who presentedand heckledlowbudget horror and science fiction movies on Fright Night on KHJTV and Seymours Monster Rally on KTLA, both local stations in Los Angeles between 1969 and 1974. He was noted for his style of criticizing the movies he presented in an offbeat and funny manner, usually appearing in a small window which would pop up in the corner, tossing a quip, then vanishing again. Sometimes he would, using bluescreen, appear in the middle of the movie, apparently interacting with the characters in the movie.
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Source: Wikipedia