Article continues below advertisementBritney Spears just shared details about a scary accident she recently had.On Sunday, October 5, the pop icon posted a video of herself performing an interpretive dance in a pink glittery mini dress with faux feathers and a plunging neckline. Alongside the clip, she revealed in the caption that she'd taken a nasty tumble.Article continues below advertisementSource: @britneyspears/InstagramBritney Spears revealed she 'fell down the stairs' at a friend's house.Article continues below advertisement"Psss I fell down the stairs at my friend's house ...