Tom calls inside, “Hey – you guys should come see this!” John and I dash outside. It’s an upside down rainbow! Amazing! Apparently these are VERY rare – I’d never even known they even existed – they’re officially called a circumzenith arc. Here are a few links about them:

http://www.bbc.co.uk/oxford/weather/arc.shtml
http://www.gi.alaska.edu/ScienceForum/ASF14/1435.html
And here’s a little symbolic information from http://www.wiredweb.com/~shades1997/Upside-Down_Rainbow.html: Understanding will turn things upside down.