Self Reflection

An entire wall at the kickboxing studio is lined with mirrors.
I hadn't been to class for a few weeks, and I always stand in the back.
But even in the back, I can see my reflection.
Yesterday, I looked shorter and curvier than usual, wavy actually. The floor looked wavy, too. It was like a fun house mirror, without the fun.
Tonight, I stood in a different spot, and my reflection was taller and thinner than it actually is. And I kicked higher and faster than I usually do.
Clearly, there is a lesson here.