The fungi you based those mushrooms on are called toadstool mushroom highly poisonous, guess they have a different effect in this world. (wonder how long the effects last?)Who know's? I'm sure Virmir will be back to his normal self in a little bit of time, I hope, and yes I am aware how much I say that.
I always knew Vir was a real FUNGI :P (fun guy....get it? *runs off*)*asks random person* Can I shoot him please?