About this scene
Bottom shelf of a long aisle, fluorescent overhead, store music low. She bends down to grab a product she clearly came specifically to get. Her leggings stretch tight across her hips when she's bent. The timing on the cumshot is the kind that takes practice. It lands on the back of her thigh just below the curve of her ass and she keeps reaching for the product. She stands up holding what she came for, slides it into her cart, and pushes off down the aisle without breaking stride.
What to watch for
Watch the angle of her hand reaching for the bottom shelf. It hesitates for half a second right when the cumshot lands. Then it continues. That's the only frame in the clip where her body acknowledges what just happened. By the time she's standing back up her face is reset. She walks out of frame at normal speed and you can see the mark on her leggings until she turns the corner. She does not look down at it once.