Muscle rigby

After serious training, Rigby still can't do one pull-up, so he runs out of the coffee shop. After that, he walks by a store and sees a commercial. The commercial has a product called "The Russian" as it states that it uses electrotherapy to build muscles, and Rigby buys it. Back at home, the instructions say not to use it for more than 10 minutes per day, but Rigby turns it up to eleven and eats a bag of chips before falling asleep. In the morning, Eileen checks on Rigby only to find him in the house with enormous muscles