Some years ago, one winter I was on a night navigation course here in Orkney at full moon, part way up a hill we stopped for a food and drink break and it started to rain. For the first and only time in my life we were treated to the spectacle of a 'Moonbow'. I hadn't realised there was such a thing! No mobile (for me) back then and not sure it would have captured it anyway. It was obviously much paler than a rainbow but memorable nevertheless.
Ian