"Guns are deadly!" How has that not registered? Even if you're holding it, it's still - he could aim wrong, or it could just go off, and the longer he thinks about it, the more he just wants it gone. Guns are real, tangible, in all the ways that this strange place isn't. Dinosaurs, magical closets; those can be dismissed as products of a crazed mind, unable to sort its way through the fog of hallucinatory sludge and discern the reality.

But a gun?

There's no questioning the reality of that.