About this scene
Convenience store bottom shelf, evening. She's a curvy redhead, in jeans and a fitted top, crouching down to grab something from the lowest row. The flash happens directly at her eye level as she's mid-crouch. She laughs once, short and genuine, then continues reaching for what she came for. She stands back up holding the product, drops it in her basket, and walks off without saying anything to him. The crouch lasts about eight seconds total.
What to watch for
The eye-level angle is the punchline. Most flashes happen at standing height. This one is timed to her crouch and she's already at the perfect viewing angle when it appears. The laugh is involuntary and you can see her catch it after one beat. Watch the product she grabs. She picks it without looking, which means she didn't actually need that specific item. She just needed something to put in the basket so she could stand up and leave.