This is the surprising thing that happens if you vape at the side of a motorway

A video of a man blowing vapour in front of a speeding truck is wowing the internet.

The short clip shows a cloud from the man’s vape shifting in a mesmerising pattern as the truck blows air pressure in the vapour’s path.

Aaron said he took the video after the fascinating phenomenon happened to his friend accidentally, then repeating it himself.

“The truck would move as much air as it has volume so it looks like the cloud moved about half a truck width to one side and back.”

The video was uploaded to Reddit and had so far received over 29,000 upvotes.