Ethan Hunt is tied to a chair and can't get up.
The super-villain Matt Fillimore stands in front of him.
There's a gun.
There's the barrel of the gun, six chambers, all empty.
Fillimore is putting two bullets in the gun, in two adjacent chambers.
He closes the barrel and spins it.
He puts the gun to Ethan's head and pulls the trigger.
Ethan Hunt is still alive.
Now Fillimore is going to pull the trigger one more time.
He lets Ethan choose: whether he should spin the barrel first or whether he should just pull the trigger.
What should Ethan choose?