I was staying with my brother, who has a shower cubicle in the corner of his bedroom. His flat is the ground floor of an older converted house. He went out, leaving me to shower and have breakfast etc. I had my shower and then realised I didn't know how to open the door to get out. Sounds daft, but there I was, wet, no towel (which was outside the cubicle), no phone, no one within calling distance. The shower cubicle went up to the ceiling so climbing out wasn't a possibility. In the end I did work out how to open the door, so all was well, but I still remember those moments when I felt trapped and helpless.