Take a walk down memory lane and check out 20 of the best staredowns to get physical.

From Anderson to Shamrock, the violent shoving, pushing, swinging (Diaz) at weigh-ins have sparked dramatic story-lines in the sports history. Who can blame them? Starving, preparing for battle and just hating that ugly mug staring you down. That drama has only fueled the anticipation further in these grudge matches.

Any missing here? Let us know your favorite stare-down to turn violent?