He didn't flinch because it's not the first time in his life that he's had a gun held up to his head before. Mostly, on those occasions he's had to dive under cover to avoid having his head blown off. You did a good job at shooting the can off, Kaz.

"Keep still." Boss readied his gun and then steadied the can gently onto Kaz's blond hair. He stepped backwards and then raised his gun before aiming down the sight....

....he shot the can off in an instant, not even touching a blond hair on his friend's head.

"Still got dry pants, Kaz?"