Heya, this is just a little weird bug thats pretty useless, but fun. This just makes it appear that your auto hearthing when your really not so you could fool someone I guess..
1. Open your inventory and your charater screen.
2. Cast hearth, but then quickly drag your hearthstone from your inventory to any slot on your charaters screen.
3. Now, it'll say that it interrupted, but it didn't so basically your hearthing without the animation, you gotta stay standing still however..but you can do emotes and such..
Again, I know this is somewhat useless, but I thought I'd throw it out there