For some reason, as long as I can't see anyone else, my mind is convinced I am alone. For this reason, I always end up singing in changing rooms and public toilets. I usually catch myself after a few seconds, but the other day it had been a full minute or two before I realised. I also realised the other day that I had been shouting for half an hour in my free period, and subsequently lowered my voice. I was very tired, and a little delirious. I often have problems adapting to volumes in rooms, so I end up shouting a lot.