Found on slashfilm. Still working through it, it is 59 mins. The image above makes it look like jackass/x-games, not the case. It features some excellent interviewing of a group of homeless men in Vancouver.
"Filmmaker Murray Siple follows men who have turned bottle-picking, their primary source of income, into the extreme sport of shopping cart racing.
Enduring hardships from everyday life on the streets of Vancouver, this sub-culture depicts street life as much more than stereotypes portrayed in mainstream media. The films takes a deep look into the lives of the men who race carts, the adversity they face, and the appeal of cart racing despite the risk." Further reading.