Slack Trick

Can anyone make a tutorial on the trick he does at 00:21?

I remember Doc Pop teaching it in a pop cast episode, I’ll try to find it for you.

Found it! 

Around 1:50-ish Doc-Pop starts talking about it. Once you get that down, all you have to do is pinch it, then throw the slack over into the gap of the yoyo.

Oh sorry I meant the chopstick trick at 00:25.