How do you make an NPC face towards a player without MoveTo()?

I have a script where this NPC throws a rock at the player. The rock throwing part works, but it looks ugly because whenever it plays the animation if the player is behind the NPC, it looks like it's throwing backward. I tried using the MoveTo() function to make the NPC face the player, but that looked ugly too. Please help. Also, tell me if you can stop the MoveTo() function even though the NPC is not at the destination.