In fact, Red Bull is an extremely popular energy drink, however with arguably that best example of "positioning" Red Bull is better known for their extreme Team Red Bull. Team Red Bull is known for extreme sports or athletes. Still you might be asking yourself the same questions as before, energy drink = extreme?
Red Bull's slogan is "Gives you wings". This isn't supposed to be taken literally, but more metaphorically. Team Red Bull is for people who push the limits, people who dream about achieving the impossible. Red Bull gives you wings, means if think about Red Bull, you'll think about all these crazy stunts and extreme athletes who are sponsor by Red Bull and "probably" couldn't achieve these feats without the energy from Red Bull. Obviously, that last past is fictional, however, this is how Red Bull's advertising is meant to position themselves by their target audience.