apperception came up with this idea way back when I first started the Dancing with the Galaxies polls. I liked the idea and the name, but I didn't want to do it in the midst of the DWTG series. But now that DWTG is long since over, it's time. This time, there will only be one poll, because I could find only four real-life galaxy cluster collision images.
The winner (if one emerges) may become an avatar of mine, but probably not the default.
Poll Clusterfuck The contestants are:
MACSJ0717 (the inspiration for the poll)
1e0657-56, the Bullet Cluster
Abell 521
MACSJ0025.4-1222