Gods are a lot less Terrifying and awe inspiring when you're a plural shaman.
I was not prepared for Thunderbird to be a wild turkey, for example, but it Tracks.
And it's really easy to know when you're hallucinating and when something Actually supernatural happens when you know all the voices in your head, and know when someone Else is hanging around.
Getting possessed by a Unicorn is a different bag of chips entirely. Especially when the Body is driving a 1 ton dump truck.