OUCH!

So today i was tossing batting practice and the sun was right behind the batter, so i couldn't see where i was throwing the ball, it was fun, i didn't hit anybody! BUT...i got hit, i got it hard, right in the side. It left a nice mark as well (see picture) I odviously didn't see it coming (sun in background) all i heard was "ping" and then "thud". It hurt!