Oh the perils of being a celebrity and saying things you shouldn't.
"It is like being screamed at by thousands of people," he said of the warm reception he received upon his arrival at the event. "I don't know what the experience is throughout history, probably some kind of genocide. I can't think of anything that's equivalent,"
He added that although he appreciates his fans enthusiasm, such an overwhelming welcome can be "horrifying".
"Maybe on some cellular memory level, that's the only thing that seems like an equivalent social experience," he said. "Even if they're saying nice things, just being shouted at by thousands of people, it's horrifying."
However, he later clarified his remarks to Associated Press, saying that it was "wonderful" to be part of Comic-Con and that his genocide comment was not to be taken seriously.
"I of course was using hyperbole to describe the sensory overload I experienced. I sometimes do employ that," he said. "I'm a normal person who has normal sensory experiences, so Comic-Con was very overwhelming for me. That said, it was really an honor to be on that end of such jubilation."
Comic-Con 2015: All the action so far