Does believing you're Odin's daughter count?
I thought I was trapped in this realm and had different "spells" to either protect me or hopefully take me back to Valhalla.
On a different occasion it was more vague, I just believed I was Fey, this time I was convinced I could create orbs.
Lucky I crashed fast and it didn't get too out of hand. Was just a weird whimsical experience or two.
I don't find it funny tho, coz atm I feel anything but special, I could use a little whimsy.