sentences:  In March 1953, MGM closed down the cartoon unit, thinking that the growing trend for 3-D films would bring an end to the animated cartoon.Avery himself did not leave the studio until June, working with co-director Michael Lah on two cartoons, "Deputy Droopy" and "Cellbound", which Lah completed with the Hanna and Barbera staff (working during the most part of 1953 for commercials, as a predecessor of H-B Enterprises) during the closure.Avery went on to join the Walter Lantz staff the following February, while Lah went on to do commercial animation work.