Bryan Veloso has been playing DDR long enough to get the whole etiquette thing—apparently, it's not just about making yourself look like an ass. But if you wanna seriously tick off some true DDR-heads, just follow this simple guide:

• Run in between the pad and the screen while somebody's playing.

• Put your coins in the machine ("prepay") to save your spot while you're playing.

• Add song modifications or change the difficulty on a player without them knowing.

• Tell or shout at new players that they "suck", "stink", or "blow".

• Rub in the fact that you're a better dancer (aka a pompous ass).

• Say freestyling is for people who don't know how to play.

• Randomly press arrows during somebody's routine.

• After somebody finishes a song, play the same song with the intention to show him/her up.

• Intentionally try to make the current player(s) mess up or trip.

• Don't follow the coin line.

Doing any or all of the above is guaranteed to "turn a great night of dancing into an environment that everybody wants to get out of"—and may ensure you receive a DDR-beatdown. Dag! 

[Thanks, Scrivs]