About this scene
Two-person setup in a busy big-box aisle, both of them shopping for nothing in particular. He's standing near a low shelf, half-frozen, when the flash happens. She isn't frozen at all. She walks over, glances down the aisle once for staff, and reaches over without breaking stride. Her hand starts working before he finishes processing what's happening. He's still got his shopping basket in his other hand. She isn't holding anything. She uses both hands.
What to watch for
She doesn't ask. That's the whole point of the clip. There's no negotiation, no checking in, no eye contact for permission. She makes the decision unilaterally and her body language says she's done this before. Watch her shoulders. They don't tense once. She's relaxed in a way that takes practice. The aisle stays empty for the full ninety seconds, which is luck, but she wasn't relying on luck. She was relying on speed.