I know what you're thinking: How can there be a sacrifice that goes Bf8 regularly enough to be called "The Bf8 sacrifice"? It's hard to believe. But if you ever find yourself having opened up the h-file but can't quite find a way to land the knockout blow, the stock sacrifices you're looking for just don't quite get it done, your opponent's counterattack is coming in a couple of moves, and especially if they've responded to your Bh6 with ...Bh8, consider Bf8! as a move. Here are a couple of example games.

Not a perfectly played game of course, but you can see how Bf8 is a thought (though there it wasn't really necessary). The next game really shows the power of the sacrifice: