YouTuber Josh McCutchen live-streams fiery truck accident

There was havoc on a motorway as 28 vehicles were involved in a pileup on in Colorado.

A flatbed truck was filmed barrelling down a highway Thursday and moments later, the chaos occurred.

Josh McCutchen, a YouTube star who streams his road trips live, went into reporter mode as thousands of his followers watched the drama unfold.

"I was just so bewildered about what just happened, like 'Where the hell did that come from?' The thing just came out of nowhere!" he told Inside Edition.