There is a background profile on Chris Mason in the march '06 issure 0f PowerliftingUSA magazine. Also list his web site
www.atlargenutrition.com.
That style of curl in the video is common practice for very large men with very large biceps. TA's approach/theory to bio-mechanics, with regard to stress, focus, muscle curve involvement, etc for the biceps is mistaken. In fact it may be a wonderful idea for TA to adopt a cheating style to his total arm workouts. If TA want's to enter a man's sport than he may first want to look like one, rather than a Calvin Kline boy model. Serious muscle development is sadily missing on his body, sorry to say. Being his own best friend (with Sarcasm?) can limit him to being more honest with himself. And less judgemental of others.
Had a free summer a while back so I and three of my Bud's traveled up the coast (starting from the Mexican boarder) to Ventura, CA. We check out and trained in just about all of the hard core gym's along the way. That and sufing a lot. Witnessed quite a few top BB'er and some Pro's train during that time. I did not see any one of them do a perfect, by the book, curl or any other BB'ing exercise for that matter. Those 20" gun's where mostly do half to three quarter rep cheating curls with DB's/BB's/Scot curls/Curling machines. Cheating is a art form. Heaving and reverse cleans are not he same as a result producing cheating curl. In doing chest, back, legs, etc, there was nothing near those massive and powerful men preforming a full ROM in perfect form. Form pretty much goes out the window when muscle mass is the goal with these guy's. Good Luck.