I wasn't intending to but I woke up early so decided to go swimming. This mast is beside the pool. Sometimes when I'm in the slow lane there are a couple of people in particular who are a lot faster swimmers. When I went in this morning in my head I was complaining in my head about the 2 guys who were swimming really fast. As I came back down though I realised the lanes had been switched round and I was swimming in the fast lane!