Some people should come with a health warning. We're talking about the kind of people who will, suddenly and without warning, take an action which will put themselves and the people around them in danger. They might run into the middle of the road. They might start climbing the nearest building or scaffold. Every friendship group has someone like this, and they always cause trouble.
If everyone started doing what this young boy has done, we'd be able to make much better-informed decisions about who we decide to befriend and spend time with. This guy does dumb things, and they have dumb consequences. We don't know how he injured himself, but based on his clothes, we assume it was probably because he was doing something stupid. Maybe his parents bought the shirt after the event because they didn't want anyone else to have to go through the things he puts them through? He even has the cheek to look quite pleased with himself!