The biggest nightmare I’ve ever had wasn’t the Lange zc plug, which when very cold you are not getting off, but a Fischer race boot.
This is coming out with the liner on.
The Fischer has a spoiler in the back that’s screwed in two places. The bottom edge of this spoiler is quite thin. What can happen is as you come out, you put pressure on the top of the spoiler, the bottom moves forward and catches the heel of the liner. You don’t know this has happened, you try harder to get out. This makes it worse. Now, you’re stuck as the spoiler has dug into the liner, you can’t go back in or get out. You’re trapped! It really is diabolical how well it catches.
I think the first time this happened I loosened up the laces and pulled the foot out of the liner. So to prevent this, I tape the bottom of the spoiler. Eventually however, just when you’ve forgotten about the issue, the tape fails and you get stuck again. The solution was always going to be to add two more screws to the bottom, but I moved on before that.
If you don’t have the slippery tape, silicone spray greatly helps on the inside of the back spine. I avoid spraying the footboard, I don’t want a slippery base. Some people actually put sandpaper on the front part of the bootboard for grip.