Perfectly normal.

If I could go back in time, I’d tell new-mother self that this

is perfectly normal.  The mirror-writing stuff, I mean (and actually it makes perfect sense in this context, since the two guys are clearly zapping in opposite directions).  So, young mothers, don’t freak out — it doesn’t mean your child is dyslexic, autistic, schizophrenic, or has his heart on the wrong side of his body.  All of my kids did mirror-writing when they first started writing, and now they all . . . well, that is to say, some of them still write like non-hominids recovering from recent thumb surgery, but they do all write forwards.

This, on the other hand, is not normal:

Or if it is, I wish I knew how to make it stop.