A well known fact about actor Boris Karloff was that in addition to movies Boris also did commercials and did quite a few of them but his best known commercial that few people do not know about was for A1 Steak Sauce that appeared in the 1960's. We see Boris Karloff in his lab with two assistants who are very excited about an invention called A1 and while Boris is demonstrating how to put A1 Steak Sauce on foods his assistants put it on stews and meatballs and fish and chicken and then the commercial ends with the slogan "A1 It's The Sauce That's A Seasoning Experiment With It" If you enjoyed Boris Karloff in movies you'll get a kick out of this commercial