You have to use your fingers to make an exit because you're so clumsy. You can't seem to get the door to open, your hands just slip around on the nob uselessly. Instead, you take your fingers and stick them into the door frame, pulling the whole thing off the hinges so you can leave.
After you make your clumsy mistake you realize that these doors come in sets (せつ). And now you have to try to open another door. And another door. So many sets of doors!
Currently there are no similar looking kanji which exist in the WaniKani learning system