Britney Spears took an unexpected tumble down a set of stairs, later explaining her leg “snaps out now and then.”

The 43-year-old former teen idol detailed her injury on Saturday in one of her now-infamous videos, showing her awkwardly dancing, twirling, and posing in a dimly lit room at her home.

“Psss I fell down the stairs at my friend’s house… it was horrible,” Spears wrote in the caption to the Instagram post. With Robin Thicke’s “Lost Without U” playing, she repeatedly clasped her hands in a gesture of prayer and walked toward the camera – perhaps a silent plea to her leg to stay attached.

The “Oops! I Did It Again” singer also smiled as she struck a series of poses, revealing bandages on her right knee, leg, and hands. “It snaps out now and then, not sure if it’s broken, but for

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