A group of thugs planned on robbing a local pot shop (allegedly for the second time that week) but they couldn't predict that Chris Vincent would retaliate with a can of bear spray.
You can see in the video that the would-be robbers storm the shop and try to threaten Vincent while he was working. Not wanting to be robbed a second time that week, Vincent decided to take a stand and unleashed almost the whole can of bear spray on the robbers.
Vincent aimed right for the wannabe thieves' eyes and made them run "like chickens" according to the shop employee.
Although bear spray sounds more intimidating, it's actually less effective for self defense against than pepper spray. Bear spray contains a lower concentration of oleoresin capsicum and sprays a wider cloud whereas pepper spray is stronger and has a more targeted spray making it easier to hit your target's eyes.
Judging by how quickly these robbers ran away from Vincent's attack, we're guessing they didn't know the difference and assumed they'd be in a world of hurt if they stuck around.