When I was at Arapiles in 2016, I got stuck in Mr Chicken, the horizontal offwidth/squeeze chimney that runs behind watchtower craxl and watchtower chimney. Essentially there's a massive pillar of rock that leans against the rest of the crag and this chimney goes behind the pillar where there's an opening. It narrows quite quickly so you can't fall to your death but it's a pretty spooky place as it's pitch dark.
It started off OK, with me following my offwidth expert friend Anna and another friend following behind me. However about halfway I started to feel my hips getting stuck. I wriggled a bit, adjusted my position and unfortunately at the very moment i was facing straight down into the blackness my hips came loose and I dropped about 2 feet into a notch, like a key turning in a lock! I knew I was definitely stuck after 30 seconds wriggling and called for help. Alex and Anna started to assist with no luck. By this point I was starting to panic despite my best efforts! Eventually after probably only 15 minutes but what felt like hours Alex (who was a big strong guy) put a massive effort in and pulled me out by my foot! We returned to the campsite chastened, where upon arrival another friend, Jeremy, who we had left cooking dinner, took one look at my ashen face and said "what the fuck happened?!"