Ever wanted to build a giant boulder out of lots of different coloured bits of lego and roll it down a hill to the theme tune of Indiana Jones? Us too - but seems we've all been beaten to it.

Some lego enthusiastics in US have posted footage on You Tube of them unleashing a 5 million piece lego boulder onto the San Francisco streets and running alongside it.

A guy in a Tommy Cooper hat is so excited he looks like he might try and straddle the boulder and go down with it, and another guy, (dressed like Indiana Jones with cowboy hat and whip) starts running in front of the monstrous lego rock as it chases him down the slope.

According to reports the boulder made it 15 feet or so before being stopped for it's own safety. Beats staring out the window.