If you're going to dance, please don't flail. Unless you're at a Phish concert in an open field, flailing is inappropriate and prevents those around you from enjoying a show. Pro tip: if you need to get some flailing out of your system, take a quick stop at the bathroom, flail to your heart's content, then join the rest of us non-flailers and enjoy the concert without letting your limbs fly freely. EDM bros are especially guilty of this offense, mostly because they can't do anything else. It's that high-stepping elbow swerve every time, and it's just disrespectful. How many more people will have to feel the brunt of your puckered duck-face stupidity? HOW MANY?