Perhaps a wayward student herself, Posh jumped on the contraption and started walking in her 5-inch heels like it ain't no thing. A quick iPhone snap, a post, and the lady won Twitter for March, 13, 2014. "Thank u @SusieCollege. Every office should have one of these,work out and work at the same time!! Genius!! X vb," she Tweeted. Indeed, Ms. Beckham. We're already looking for places to stash four or five of these babies around our HQ. Sorry, interns, you'll just have to squeeze in a little tighter.