"You don't even know if it's 'people'!" Doc says, getting increasingly agitated and exasperated at Malcolm. At them both really. "I'm the only one here who has dealt with demons and witches and non-people." The only reason he hasn't been insistent on volunteering to cross over is because the very idea of getting to the other side when they don't know what their maybe-friend-maybe-foe is capable of is just plain stupid. It may be a one way trip over and if he doesn't make it, he's worried he will survive the fall, which he is pointing out to them.

"And what was the plan exactly, when it blows you off the same way it did Mister Five, and you break your ribs and your legs and whatever else you've got to break on your way down this crack in the ground? Do you even know how deep it goes? You ever been stuck in a dark hole in the ground? Alone? Do you even know what that'll do to you?" He's got his back partially turned to the fissure so he can gesture at it without looking at it. God damn them both for bringing up old traumas. He doesn't have hand tremors but he's got eyes that have Seen Some Shit.