If you've ever played sitting next to someone else, you'll notice that not every animation is shared, just position and future position. If you hold the mouse b

If you've ever played sitting next to someone else, you'll notice that not every animation is shared, just position and future position. If you hold the mouse button and spin in a circle, it won't show on the other person's screen. And the spells aren't governed by the animations position, but rather calculated and animated as a "hit" or "miss" completely independently on the other person's computer.