My uneducated guess is that it is a chimera. I've seen similar on a bloom, but never again. From what I've read, the genetics of a bloom are just the same as the genetics on all of the other blooms on that cultivar. It doesn't increase your chances of getting a double, polymerous, or other "freak" bloom from that pollen because the bloom that day was weird. I WISH that some of these "different" blooms would help our chances of coming up with something very special. That won't stop us from trying, eh Spunky, Lyle, Tink, Cindy, et. al.?
David