A video posted on Instagram of a Brampton cyclist holding onto a truck that is traveling at 70 km/h on Steeles Avenue East has drawn criticism and a warning from police.

The video shows the cyclist holding onto the truck as it drives along Steeles at Highway 410. It was filmed by the occupants of a vehicle behind the truck, who can be heard expressing their disbelief.

"This guy's gonna kill himself," one says.

"This guy is not scared at all. Look at him. We're going, like 70 kilometres an hour."