When bodybuilders get so obsessed with their size, they can take some desperate measures to get big. One of the most popular aids in recent years has been synthol, a synthetic oil that is directly injected into a muscle to inflate it. The end result looks unnatural and bizarre, but it certainly does the job. Gregg Valentino was, at one point, the man with the largest arms in the world, and he employed synthol to keep them huge. Administering all of those injections took its toll on Valentino, though, and he developed a hematoma in his right arm that started leaking pus. He tried to drain it himself with a syringe and his bicep exploded, making a grotesque, bloody mess that resulted in a trip to the hospital.