Love your Parisienne story Rowan!! And the singing Hikers sound great, hope someone comes across them again!

I regularly sing walking down the hill to work, usually with very little mouth movement when there are cars coming towards me and sometimes completely silently. The different rythms have actually helped my breathing control and I've learnt a lot of songs this way. I confess though, I never sing on the way back up the hill in the evening, its mostly puffing & panting :-)