Personally I would start questioning the physics of a snake being on a vertical surface with nothing to grip. Not wanting to look foolish in the event of a pran

Personally I would start questioning the physics of a snake being on a vertical surface with nothing to grip. Not wanting to look foolish in the event of a prank, I'd second guess the construct as an illusion or toy. If the snake itself was moving or within perceived striking range I would nope the fuck out of that room, prank or no prank. Barring any exits, I'd reach for my knife.