Sienna Miller “popped out” of her bikini on holiday in Malibu.

Well, I say “popped”…

“Slid” maybe.

It’s basic physics. What’s to hold it? The dozen or so molecules in her breasts just don’t give her the purchase.

It must have been tough for Miller, having to frolic in the waves like that. She spent the best part of 200 calories, which means no more food now until October.

Take another look at that torso. Jesus, that ribcage scares me. The last time I saw a ribcage like that, UN inspectors were scraping the soil off a pit with a bulldozer.