There's a little bit of predictability going on here.
Nack is predictably unpredictable. I know what he's going to do, but I'm not sure HOW he's going to do it. So even if I know he has a trick up his sleeve, he can still surprise me because I don't know what the trick is.
At least the SA-X doesn't have to go very far. Just has to walk about one step. Well, less than that because because she has a gun. Or maybe she will have to follow Nack, thereby requiring more walking.
I guess it's a she.... Is it?
...the trap is obvious, there is no trap, he will shot her the moment her back is turned as she bevies that there is a deadly trap awaiting, or nack will make his escape while the SA-X's back is turned...... unless the whezil rigged a partial cave in to bury her
Here's the thing.
Nack has NO PLAN...
But he knows that EVERYONE knows he'd have a plan. So he's using the advantage that he knows they know he's got a plan and a trap set... even though he doesn't. ^_^;
That's the beauty of Nack. He improvises everything on the spot and lies to, deciets and double crosses everyone who gets in his way of getting what he wants.