The average doorway is roughly three feet wide, and perhaps up to six and a half feet tall. Allowing up to two people to squeeze through given that one of them is not completely rotund.
A garage door is massive, allowing any number of people, and for the larger ones, vehicles, to pass through unhindered.
But hatches, and things of that size, are tiny, one person at a time sort of entrances and exits. So its completely plausible, that as one person is using it to enter, you couldn't -possibly- use it to exit, especially if said hatch was something you'd have to crawl upward through.
Since role-playing said situation doesn't seem plausible, I opt for a coded resolution here. Thank you, and good day.