Yeah, I was out with a bunch of friends on a kind of adventure trip. We ended up climbing through a cave(I'm a chicken so it took A LOT of persuading) and I eventually agreed to climbed through. My helmet was so big it got stuck as the cave walls were really close together and we were going downwards. I was stuck for about 5 minutes panicking until I eventually got free and carried on. Luckily, I survived.