This is situational awareness (apologies for the brief deviation from the generally PG-13 rating of this site):
So Han’s walking down the halls of Bespin with his old friend Lando. Leia’s there, and lookin’ good. Han thinks he’s off to dinner – maybe some wine, a little flirting, and then back to the ol’ guest quarters with Her Hotness.
But the door opens, and there’s Darth Vader.
Han doesn’t look incredulously at Lando; he doesn’t duck or run away.
What does Han do?
He starts shooting at the motherf***er.
He starts shooting.
Be like Han.
Fictional or not, that man’s OODA Loop consists of a point.
(Also, if you somehow made it this far in life without seeing the scene in question:
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(Courtesy of Random Nuclear Strikes.)