After being sidelined by a calf injury for the last four weeks, Max Chmerkovskiy rejoined partner Heather Morris for a jaw-dropping rumba set to TLC's "Waterfalls," earning them the season's first perfect score of 40 out of 40! And then, in a twist literally no one could have expected, the pair were eliminated, leaving the audience booing and hosts Erin Andrews and Tom Bergeron -- as well as every other contestant -- totally stunned.