I came across a mirror on one of my first lucids. 3 mirrors, actually, standing together on a table. I was curious to see what I would look like because of all these rumours, but my reflexion was pretty normal. I then started to morph myself for kicks. Only after I was through with all the morphing and enjoying my handiwork did i see my reflexion start to change on its own and make me look deformed.
It's was fun.