Do you ride with clipless pedals? Do you stand up and pedal?

If you're sitting, clipped in, I guess there is a point on a very steep hill where it would be difficult to stop and unclip without overbalancing backwards. I only get this when trailriding, every now and then I can't make a short steep incline. But I'm virtually always standing at that point, which makes it a lot easier to move my weight forward over my feet. Unclip fast, put a foot down, lean forward, let my bike lean over if it has to.