@KatherinWinter Well, you could easily make it that way. I can roll with the flow, but I will clarify my intention.
Most of what I wrote wasn't intended to be a hallucination, beside the
"Desperation grew in his head like weeds, more and more thoughts of his children suffering and dying on the ground like his friend, sprouting in his mind, covering up any other thoughts and killing them" part which is due to the necklace. What actually happened was the woman could hear Bastian's thoughts and changed the spell, transporting us off a waterfall, basically to spite him. (For reasons. :P) The falling in the lake and swimming to land and appearing somewhere far outside the city. Wasn't part of the hallucination. That happened. (It also, probably more than likely would give your character some kind of cold, being drenched in rain, staying in wet clothes, only to plummet in a lake.)
But-you can easily make it that way instead. (Making it some kind of hallucination, like we haven't left the tunnel yet or something. If you want me to do that, for one reason or another.) And I'm more than okay with going down that road. ;3