He got into a fight with a dog. Did the dog bite him? No, this guy's an electronics engineer who works in advanced computer technology. And it so happened that a big dog threw a brick at him.
When the first brick hit him in the chest, he raced forward desperately with the intention of cutting off power to the big dog. But the beast promptly threw another brick that hit him in the head. And then another brick that hit him in the solar plexus. Finally, the beast ran out of bricks, and it ended up throwing a computer at the poor guy. At that stage, lab workers were able to get up close enough to turn the dog off.
Here's a spectacular presentation of the animal's evolution:
If ever the big dog were to step up to me, looking like it wanted to lift up a leg and piss on me, I think it would be best to say: "You're welcome, my friend." No sense in doing anything that might peeve the beast.