Like many others, Caitlin decided to take on the viral 'Flip It' challenge. Like many others, she quickly discovered that this gymnastics trick was far from easy. "Here’s a clip of our attempt going ...

Roughly six times every hour, from 5 a.m. to 10 p.m., a small miracle transpires in San Francisco. It halts traffic, flips sensitive stomachs and, on occasion, elicits cheers. Around 100 times a day, ...