The basic idea behind this trick is to take the Hidemasa Hook (created by Japanese 1A player and Duncan Crew member Hidemasa Semba) and turn it sideways. Actually, the real idea that led to this trick was to make a something that looked like a special move from Street Fighter II... but I digress.
What happens, more or less, is that you throw a normal breakaway, and then pop the yo-yo up. While the yo-yo is in the air, you swing your throwhand so that the string whips through the air and hits your freehand finger. When it hits the finger, it'll wrap around it and create a horizontal loop. The idea is to get that loop in the gap of the yo-yo Ã¢â¬â€ no easy task, but a very cool effect if done properly.
So, what's the big deal? It's no revolutionary trick, but it puts a unique spin on the classic hook formula by moving on a completely different plane than usual. And, I mean, you're doing a freakin' sonic boom. Can't touch that.
Step 1: Throw a Breakaway
I'd probably recommend learning it from a sleeper, 'cause it gives you more time to whip the string around... and more time means you can shout "SONIC BOOM" and get the dramatic motion in, too.