It's the other race that stops a nation -- the 2015 Red Bull Billy Cart Race saw the UK royal family, a giant thong (that's a flip-flop if you're not Australian), and a big yellow kangaroo fly through Sydney's Centennial Park on Sunday.
The annual event unites amateur and experienced racers to design, build and race a homemade billy cart in teams of three. The machines are powered by gravity and nothing else, with the event taking place in 40 countries since the first race in Brussels in 2000.
Here's a look at what went down at the unusual event:
There was a little clowning around.
"Roads? Where we're going, we don't need roads." Or maybe you do...
This is actually Porsche's new Kangaroo Boxster.
You're toast.
Miley's wrecking ball is coming for ya.
Luke Skywalker: "I told you Chewbacca, this time I'm driving."
Chewbacca: "Rrrrrrr-ghghghghgh!"
Princess Leia: "Please stop fighting."
The Big Thong with a smooth run...
...but all good things must come to an end.
