WATCH: Are These Identical Twins Fighting in the Womb?

This video went viral in China last year, but it's everywhere now. It's an ultrasound scan of identical twin girls who are only four months along . . . and it looks like they're fighting each other. They appear to be kicking and even punching. They shared the same amniotic sac and placenta, which is rare and risky . . . but they were both born safe and sound.