Woah! How did you do that?

So I've found through my own testing that jumping isn't necessary to make this work. Also you don't need a item in front of the door to make it work. Despite that, I have no idea what makes it happen only SOMETIMES.

What seems to be happening is that the collision mesh of the door is sometimes messed up when you try to open a locked door. It seems that this mesh is consistent, though. Doing this from the other side of the door creates a different mesh, but it also might break the glitch (since I haven't got it working since). That's all I can gather.

No, but I'll do more testing. I want to know what causes this. Chances are that it won't work on sigil doors, but you never know.