At approximately 9:15 PST November 13th 2010, myself and a friend saw what can only be described as a comet that was green, over the state of California. I'm doing more research but if this turns out to be some thing big I wanted to blog about it first. More information as I get it.
This LINK shows some thing similar to what we saw. The one we saw was not as big and we didn't see it break up but its the same green color.
So it seems this isn't unheard of but is pretty rare. I'm very lucky and really happy to have been able to see it.
Edit: My projected path the comet took based on my sighting.