Ms Bjornsen didn't know it at the time but a truck had flipped over ahead of her - causing the two hour traffic jam. Traffic had come to a complete stop on the busy Miami highway on Wednesday and Ms Bjornsen's car was running low on petrol.
"I had my windows down and my engine off as a result," she tells Inside Edition. "And the view from up there is pretty nice so I couldn't help but get out. I figured it was my only chance ever at striking a pose on the highway!"
So, that's exactly what she did - even asking a fellow commuter to get out and take her picture.
In a blog for the Miami New Times, where she works, Ms Bjornsen writes: "The reactions (to the photo) have ranged from "Lock Her Up" to "We need more of you in this world." Obviously, I prefer the latter. The truth is I didn't really do much yoga on the highway - I was just trying to make a point about traffic in Miami and how we handle it."
Well, now you know what to do the next time you find yourself stuck in traffic.
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