World's largest 'elephant's toothpaste' fills LA backyard

Footage of a record-breaking backyard experiment has gone viral.

Nick Uhas and David Dobrik created the world's largest "elephant's toothpaste" by mixing food colouring, soap and hydrogen peroxide, causing the formation of a massive foam volcano.

The result was a whopping 200 cubic metres of blue foam discharging in a Los Angeles backyard.

"Looks like a Hollywood action scene!" Uhas said on Twitter.

Video of the experiment has been watched more than 1.2 million views on YouTube in just two days.

"This is insane," one commenter wrote.

"Imagine being in LA and just seeing random puffy blue bubbles in the air," another said. "Wow."

Uhas and Dobrik carried out the experiment because they wanted to surpass former NASA engineer and YouTuber Mark Rober, who undertook a similar experiment earlier in 2019.