Rock, throwing it at the mirror

You're not going to play any games, you're not going to solve any riddles. Today has been weird as fuck already and you plan on making your frustration known.

"Fuck off!" you shout and spin, hurling the stone at the mirror. You see a twinge of surprise in whatever is pretending to be you in the mirror.

The rock impacts the wall, a shattering noise fills your ears, so loud you cover them instinctually. The floor gives way beneath you, the sound of glass impacting an uneven terrain. You descend, weightless before landing back first into a sloping jagged wall.

Your head hits the floor following your body, a sickening crack fills your ears and the world turns black.