reply to earlier comment ...

"It's hard for me to imagine what advantage you get from speeding up the opening of your knife like that by a fraction of a second"

It depends on your situation, training and skill. Against unskilled opponents, esp. where you've got some reasonable maneuvering room, the drawing of your knife is less critical. But against a determined opponent (esp. at close range), or someone who knows what they are doing, those fractions of a second are vital. With the right training and practice, that wave feature on the Emerson knife could be a lifesaver.

I would be the first to agree, though, that your best strategy is to walk away from a knife fight.
And I also agree with Montanero - that if you stay in the fight and your opponent does the same thing, then your chances of getting cut are pretty good.

Pete2