If you’ve been to a wedding in the last couple of years, you’ve doubtless faced the masses of people, smartphones and cameras out, doing their best to outshoot the official wedding photographer. If it’s not someone standing up in front of you for the first dance, then their flash is ruining everyone else’s shots. This segment from KTXL FOX40 in Sacramento warns any and all, “Don’t Be That Guy.”

Produced by Sabrina Rodriguez, with footage from Love Genre Films, it shows just how easy it is for a wedding guest to get in the way of the professionals, and potentially ruin the final footage or images.

Though, while this video is good, it doesn’t address what’s truly the worst of the worst: people who shoot with their iPads. Just be cool, folks.