I did this over some 2 years ago and TRIED to perfect this in the game..., but I only have done this on the xbox 360/xbox one take of the game.

Now I’m not sure if this was ever found before, but I will work on making a clearer video of this pretty soon!

Since my explanation is a tad bit off..,

1. before the double agents fight there will be 3 enemies that fall from crates..., just match up damage w/ the third one and both you and garcia/galsia should be knocked out.

2. run up against the the upper line (bottom line on BKIII)

3. If knife is visible, then you should be able to force the incoming knife guy to zip himself in the next room w/ an open knife to take out the donovan incoming at normal speed.

This would only work with 3-5 star characters (Skate and Blaze) and difficulty wise easy and normal mode since those are the 2 main difficulties where the falling guys would die in one shot.

Now I'm am VERY uncertain if there’s any explanation for it, but I have been playing the game like this so far and never really had any intent on changing the format.