noone is 100% right in this clip, but as someone pointed out.... the laws of physics dictate that you are going to bounce a loooooong way if that thing hits you from behind. i met a lot of truckers in florida especially, who claimed to despise cyclists sharing their road. you can't rely on everyone keeping to the rules. your own safety comes first and that starts with realising you are made of meat and the truck is made of metal.
a bike brakes much quicker than a speeding truck. get off the road when the horn sounds and you'll live to ride another day