- the Vegetable Gremlin burps after drinking vegetable DNA. The Vegetable Gremlin was one of the many gremlins that invaded the Clamp Center building. He is the first Gremlin to become a mutant gremlin and changed into a creature of living vegetation after drinking vegetable DNA after he mistook it for juice. As a result from drinking the vegetable serum, he is very prone to burping and belching.