I think Nack's getting used to having his life threatened by now.
Guess I was right about the energy boost thing, but I think this is the one time Nack was legitamtely NOT doublecrossing Samus and Chrono, it was just a ruse to expose the SA-X's back to attack.
It's apart of his daily routine. Wake up, eat a bagel with cream cheese, read the paper, back stab someone, then have his life threaten by someone he back stabbed the other night. All this before Noon, except for Sundays, hich he sleeps in.
Yeah. Here's his noon Schedule:
1:00: Backstab someone else
It's old, but with Nack, if actually makes sense. He'll just wing it and win a quick buck.