There's an obscure video of a Warlock dancing thanks to Destiny Informer, but if you note you'll see the Hunter slow clapping and breaking in and out the animation. I hope we can modify the dance routines as we go. It got me to thinking about the use of the pointing animation as well, especially in the tense stealth moments. Anyways I love the dance routine, it going to be extra hilarious during boss fights. Because you know you're going to use it right at the most crucial moment.
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That got me thinking, I hope there's a large variety of moves you can choose from, select one, and assign it to the "dance"-button. It would also be cool to change it on the fly from the menu.