Hippos

I don’t know who I can trust with this, but things have been really weird the past few weeks.
When I’m with my friends, all of the sudden, they turn into hippopotamuses.
Yes. Hippopotamuses. Gigantic grey beasts with huge mouths, eating straw and wallowing in the mud on the riverbank.
Just as soon as they turn into these creatures… they’re back.
The first time it happened, I got up off the floor and said “Did you just see that?”
Nobody did. It was just me.
What? Why are you looking at me like that?
Have I… turned into… a… hippo?