I watch Penn and Teller from time to time. I find some of their stuff entertaining. I even find some of it interesting. The episode on martial arts now has me re-evaluating my stance on the show.
These guys are based in Vegas and they are trying to point out that martial arts are Bullshit. So why did they avoid all of the MMA schools in the area? Couture, Drysdale and Laimon have grappling classes in their backyard but there is no footage of any of these schools on the show. They alluded to "The Karate Kid" multiple times so they should have at least paid Laimon's school a visit.
They want to make light of the impractical aspects of some of the martial arts and they base an entire episode on it. This only makes me wonder if they have not done the same thing with other topics I am less familiar with.