The first one is funny.
The second one just hurts to watch. That guy was in bad shape.
The third one is part of a Fox Sports commercial that makes fun of fake sports around the world and ends with the tag line "sports that matter to you". It's actually completly staged. But still funny!!! The rest of the series of commercials like that are also hilarious. People hitting eachother with logs, guys highdiving into solid mud. The campaign won numerous awards.