"Legs apart, like this." Vash would stand firm and pointed his gun at the target, taking a shot and hitting a bullseye. "Now you try." He'd say with an encouraging smile.

You'd stand like him and point your gun at the target and shot, missing the target. You'd slump, Vash coming over to your side. "It's okay. Here, I'll help."

He'd stand behind you and positioned your body correctly, holding your arms to aim at the target. "Aaaand... Take your shot!"