Ah, but that's the brilliant part: the door is part of your attended equipment, therefore it's hiding behind the cover (the door) as well! Yes, the door hides behind itself.<br/><br/>Granted, an easier way to deal with it is just to say "Sure you can attempt to Hide without proper cover/concealment. Not when someone is actively watching you and knows you're there, of course, and there may be a penalty based on how much light etc. there is, and your own personal camouflage, but it can be attempted."<br/><br/>In other words, what most DMs do anyway. Not many people even realise that the rules seriously say you can't hide at all unless you have cover or concealment. It's related to D&D not having facing, though I'd never use that as a reason to bring facing rules back.<br/><br/>But come on! Doors that hide behind themselves! You can't see them, because they're in the way!