Tesla CEO Elon Musk said Monday he does not support merging his electric vehicle (EV) company with his artificial intelligence (AI) firm, xAI, after the idea was floated last week by a prominent analyst.

Musk, never one to pass up the opportunity to showcase his juvenile sense of humor, quote-tweeted the image of the phallic geofence shortly afterwards and wrote “Bigger, longer and uncut” accompanied by a laughing emoji in an apparent reference to the South Park movie.