Don't worry about it, the picture on the left? that will never happen to you. It's not like you're gonna work out right and eat right for 2 weeks and you're gonna blow. These guys are on TONS of steroids, GH and insulin. The picture to the right, is what you could achieve by training for severals years and by following my advice. Your muscles will never ''grow'' out of control. You'll never wake up and be like ''OMG I'M TOO BIG''. It just won't happen.