Omnatrix malfunction

"Alright you listen here, it's hero time!" The hero of the universe Ben Tennyson said and used his omnatrix,"Get ready for Humgasor!" He said and a flashing green light went over him but he didn't transform,he was standing naked,his 3 inches, however the omnatrix was on his chest, it's like he went alien but not really

"AHHHHH!"