We have an integrated laundry drawer in the bathroom:
Unfortunately, after Mechel left the bathroom and closed the bathroom door, the drawer slid open, which blocked the bathroom door. We couldn’t get in to the bathroom!
Thankfully, there’s a coat closet that shares a wall with the bathroom wall:

I drilled a hole into the bathroom using a 2-foot long drill bit. I stuck an electrical snake through the hole so that the snake curved up. Once I got a few feet through the hole, I rotated the snake down, hopefully into the laundry bin. After a couple tries, I was able to catch the back edge of the hamper and pull it shut.
Here’s what it looked like once we got the door open:
The side view:
I drilled a hole in the back wall of the hamper drawer, and tied a string to it that runs through the wall into the closet, so if it happens again, I can pull it shut with the string.
Glad it worked out, I would have hated to cut a hole in the bathroom door!