It's this really cool Japanese obstacle course competition where they start with 100 challengers and each person tries to make it through stages 1-4. It's in japanese with english subtitles which is cool because there are crazy enthusiastic Japanese commentators. Apparently the show has been around since 1997 with 2 competitions each year and since then only 2 people have ever completed all 4 stages. Its my new favorite show!
It starts out kind of silly on the first stage and then gets very serious as the show progresses.