In an old episode of their show called Bullshit!:
Unless you’re real uptight, all the Penn & Teller Bullshit! episodes are pretty awesome.
Nothing too surprising in this episode (or a lot of the other ones), but they are mainly funny because they make some people look like idiots, debunk myths with facts and non scientific demonstrations… basically just a lot of fun.
(8:41) – Kind of rude the Marine let Harrison shoot that AR-15 improperly (pictured below)… no wonder the little guy didn’t want to shoot more than one round he basically got rocked in the shoulder and cheek then cried about it.
Hat tip: David B.