Squeezing down a crevice to poop

Stride down a hallway like Dio, alongside my infinite alternate selves, synchronizing perfectly as we sit upon the porcelain throne

Bonus points if it's plain black tile to the right or left (don't need mirrors for that part), but a mirror prism on the back wall that'll make it feel like the mirror dimension. It'd kaleidoscope little warped fragments of you as you walk through if you do it just right