Wrong hand

"Three, two--" the director murmured to himself as he stared at the screen. One of his arms was raised, and he was about to shout "Cut", but suddenly, Vivian Siew turned around to the camera and bowed apologetically before saying with a guilty expression, "I'm sorry, Director. I think I've messed up that scene. Can we do it again? I want to show my very best performance. Besides, I think Ms. Xiao Lei would want to try again, right?"

Vivian Siew turned to Xiao Lei, whose face now had a red palm on it, and said, "Ms. Xiao Lei, don't you think that my performance was a little off earlier? We should try again, right? I mean, I'm sorry, but I just want to do my best."  

The director stared at her for a few seconds. He then looked at Xiao Lei. After a moment of hesitation, he cleared his throat and said, "There's no need. The shot-"