What did Chu just do?

[nuro]

http://www.youtube.com/watch?v=rw279Qyo21k&feature=rec-HM-fresh+div @ 1:09

It looks like he rolls and just holds down b to have nana do the down b but I am not sure so can anyone just elaborate?

 

[Kyu Puff]

Roll, spotdodge, grab, and a few more things let you buffer a desynch. Roll and hold the command you want, and Nana will do it independently.

btw, is this nuro or nito on nuro's account?

 

[nuro]

This is mindgames on mindgames' account.

 

[*P*L*U*R*]

Noobslayer desynch. Unpunishable. Soo ****. So easy to do.