Video: Demetrious Johnson forced to take USADA test at convenience store

It's no secret that United States Anti-Doping Agency (USADA) will go to extreme lengths to collect a sample from a Ultimate Fighting Championship (UFC) stable member. Earlier this year, USADA reps were nearly greeted with heavy fire from Army veteran and UFC middleweight Tim Kennedy, as well as welterweight contender Jake Ellenberger, who welcomed his early-morning risers with a Smith & Wesson. While it's important for fighters to test randomly in order to obtain the most truthful test results, USADA has found a way to become a world-class pain in the ass.

Current UFC flyweight champion and pound-for-pound standout Demetrious Johnson learned this the hard way earlier this week when USADA…