About this scene
Big-box store aisle, evening, light shopping crowd. She's pushing a cart with three items in it. He flashes from the next aisle over, partial cover, just visible through the gap in the shelving. She does not laugh, does not stare, does not move away. She gives a quiet smile, looks down at her cart, picks up an item, and puts it back. Then she loops the aisle one more time. By the third loop she has not added a single item to her cart.
What to watch for
The smile is the only thing she gives him. It's small and deliberately minimal. Most reactions oversell. She undersells. Watch the cart. It moves at the same speed for all three loops. The items in it never change. By the third loop she's clearly not shopping anymore, and her quiet smile has stretched into something a little closer to a real one. She does not approach. She does not leave. She just continues looping until the clip ends.