Reply to Pressing Cue 1 in juggle mode = Play?

There was something Ean did in the Aerodynamic video that I've been trying to figure out how to do. There's a few times where he's in juggle mode and presses both Cue 1 buttons at the same time, but then one deck continues to play after he lets go of the button. I would love to be able to do this and can't find in any of the VCI-100SE videos how to do this.

I was under the impression that you had to press and hold a cue button then press the juggle button to keep the deck playing, but Ean's video showed otherwise.

***UPDATE***
Figured it out. You have to have press CUP on the track and that will allow you to hit a cue point and have it actually play from there instead of just playing for however long you're pressing the button.