I remember a thread about riddles/jokes or what not from way before, but of course I could be just having an over active imagination.. How about we revive/start it up?

Here's one:

You're trapped in a room. One door leads to heaven, one door leads to hell. One bird is AlWAYS lies, one bird ALWAYS tells the truth. You don't know which door is which, and also don't know which bird is which. The birds, however, know exactly which is heaven and which is hell. As soon as you open a door, you're stuck with it. You get to ask ONE question to ONE bird. How do you figure out which door leads to heaven.