See this? This is the infamous "devil's horns", or "sign of the horns". The universal hand gesture for, "ROCK THE FUCK ON!". While he didn't "invent" the gesture, Ronnie James Dio is typically cited as the source it's popularity in the metal scene. As you can see in the picture, the correct way to "throw the horns" is by first, extending your arm out. You then extend your pinky, and index finger, making sure your middle and ring fingers remain down. Finally, you move your thumb ON TOP OF THESE TWO FINGERS.
What you DO NOT do, is this. The gesture shown on the left is American Sign Language for, "I love you". Sure, you might love the band performing, but that does NOT give you the right to extend your thumb. When you do that, you loose any hope of looking cool, and instead get moved into the "drunk bitch that shouldn't be here" category. You don't want to be in that category, do you? If you need to think before you answer, then perhaps it will help if I also remind you that from now on people in this category will no longer have a thumb that they can erroneously extend. It's simple. If you want to be able to hold that beer that you keep drenching people in, then all you have to to is fold your thumb. Just think of all the fun games of Thumb of War you'll miss out on if you don't.
Just as a disclaimer, I may or may not get around to updating this post with an actual review. If I don't, then consider my official review as: "It was good." For now, I'm setting this to autopost at 12:01 on Sunday. If you're seeing this disclaimer, it means I'm still doing piles and piles of busywork for my fucktarted teacher, who that I hope with every ounce of my being that he gets fired. Seriously, the fact that his molecules are even on our plane of existence is pissing me off.