When I was younger, I sometimes used to work weekends with my dad's masonry crews. Have you ever seen masons throw stacks of bricks? It's pretty damn impressive and cool, but at heaert it's merely a (very practical) parlor trick. You take six to eight bricks stacked up together and toss them up into the air in a parabola towards someone up to maybe 20 ft away.

The bricks follow the rules of physics and come down the way they went up, together. They are not moving very fast horizontally, because there's hardly any horizontal force vector involved.

The trick to catching them is to put your (very calloused) hand under the bottom one and then apply upward resistance until they all come together and you can put your other hand over the top one. Then voila, you have a stack of bricks in your hands, the job is getting set up fast as hell, and nobody got hurt.

Well, what do you think happens when somebody misjudges and the brick hits their skin somewhere in a horizontal direction?

Even with a small horizontal force vector, blood inevitably happens. Sometimes a little, but sometimes a lot.

You can't hit somebody with a brick and not cause bleeding.

Been there, done that, seen it. (Have the scars to prove it.)