The weird green light is really just adding to the whole maybe death thing, and, well. Maybe Billy's never seen that shit up close but it wasn't too long ago that aliens invaded New York City and now Tony Stark flies around in a metal suit while a guy dressed as a fetish devil beats up criminals. What's a little magic light?

"I can walk."

Billy's never had to lean on anyone in his life, not by choice, and he's sure as well not going to start now. Besides, how far can shelter or some sort of civilization be?

(Unless he's dead and he's literally doomed to walk around this foggy shithole for eternity.)

"Do you know which way?"