Opening Hatch while Downed
I think it would be a good idea to open the hatch while downed. Many times, if you have a key and the person who was hooked was about to be sacrificed, the killer would stand on the hatch and down you. Right when the hatch opens, the killer either closes the hatch before you can leave or pick you up and take you to a hook. For these reasons, I think opening the hatch while downed is a good idea.