This is why you shouldn't try and show off while holding a £50k camera

Cinema-quality video cameras are expensive.

Like, "Work for a year, save all your wages while you only eat beans and you might be able to afford one" expensive. 

Take the Arri Alexa model that features in the following video. With a film-worthy lens set up, one of these cameras costs in the region of £48,000. 

You'd probably treat that kind of gadget pretty carefully, right? Not this tit. 

In order to demonstrate the capabilities of a steady rig at LA's Cine Gear Expo, this muppet decided to literally do a dance to illustrate how the rig worked - letting go of the camera, which isn't how you're supposed to use a rig.

And that is how you ruin your day.