Wow, this is actually incredible. We've been fans of Jeff With Glasses for a good time now but this just refreshed our memory as to just how good this guy is. Precision grinds down really burly setups never gets old to watch. Seriously, some of these with have your brain straining to understand. 60/40 lunacy. Watch more parts from GT's 'Seriously Fun' DVD below in our 'related content' section.