Sonic Boom yo-yo trick (Anti-yo contest)

Step 2: Throw a horizontal hook.

This is the real body of the trick. In the original Hidemasa hook, you threw the string in the same plane as your yo-yo towards your freehand, letting it wrap around your finger and, more importantly, fall into the yo-yo's gap. In this trick, instead of moving the string upwards parallel to the yo-yo, you're pushing the string perpendicular to the yo-yo in a horizontal motion across your body.

This step isn't actually that difficult, I just like to act mad hard. Basically, pop the yo-yo up and then swing your throwhand forward away from your body so the string lashes out around to the other side of the yo-yo. Make it pretty! I'm not really good enough yet to make the slow, huge loop, but be sure to make it look as sideways as possible.

...and if you're having trouble working the motion, seriously. Watch Guile throw a Sonic Boom in Street Fighter II. It's the same motion.