Sneak Attack after the fact? - any guides?

Hello all

 I recently switched my main RSI to a spy class tree and am having a blast with it.  There is one thing though that has eluded me so far.  I keep reading spy guides and seeing in game examples of it (I had a duel with one person who did this to me personally just the other day).  There seems to be a well known combo or trick to delivering a sneak attack mid fight.  I'm not quite sure, but I think it has something to do with disquise.  If anyone knows of a post or guide to this technique please let me know.  I tried a search on the topic, but was unlucky.  Thanks much

Here is a quote from the spy guide I read online fromt theseforums.

"A common tactic I use is as soon as the duel starts, turn to Grab tactic, break shield, might take another hit to break in some cases. Switch to Power, then hit with a Neuro dart. Suplex, then finish the poor **bleep** with knives in IL. Roll out and apply a punt for more fun!"

 If you look at the order of the combo his saying to use suplex (which is a sneak attack) almost near the end.  So how does one use a sneak attack when you've already instegated combat?  I thought that Sneak attacks could only be used from stealth and outside of combat.  (I.e.  You can't resneak or reapply a disguise while in view of a enemy, so how does he do it?

P.s. the actual guide posted is at this link

http://forums.station.sony.com/mxo/..._id=35500000297