This video out of Nice, France, shows what appears to be people trying to stop a truck before it begins its rampage through crowds of people Thursday, reports Australia's 9News. It's difficult to make out exactly what's happening, but people—it's not clear whether they're civilians or police—can be seen chasing the white vehicle. The most dramatic part appears to show a motorcyclist catch up to the truck, get off his bike, and try to jump onto the truck's cab before falling off, according to a post at Pravda that hails him as the "Hero of France." His fate is unclear. A witness tells the Daily Express that at another point, "people were hanging on the door and tried to stop" the truck. "We have never seen anything like it." (The driver has been identified.)