found this elsewhere online. Just posting it here for the heck of it.
http://www.guitarseminars.com/ubb/Forum ... 01800.html
"I have seen web tutorials describing how to play the "boom chick" by playing the 6th string only on the "boom" and playing the rest of the chord on the "chick" part.... Bob [Brozman], in class, taught a different way to do this, which certainly sounds more 'manouche' to my ears. He teaches playing the 'boom' part by slicing with a down-stroke through all of the strings followed by a quick left handed mute release. The "chick" is played in the same manner except that it is slightly delayed in time to make it swing. This is accomplished by either 'digging in' by pressing firmly into the strings on this second down-stroke thus physically forcing a slight delay in this second chord. An alternative method that he teaches is to swing your right arm in a direction away from the bridge. I prefer the second method."
[this bit was also interesting, from Bob himself this time:]
Hey swingin' peeeples---
I'll be giving a workshop in basic swing rhythm for people unfamiliar with swing, and also be available for swing jamming. Caution: I have been really into playing Besame Mucho, but in THREE, then "flipping it" ---what a fun groove it becomes!