what I think happened is, me and my friends reviewed this one a lot, I think we agreed that she probably took out one, then used the earthbenders (yes, they were earth benders, I saw them earthbending later in the add, with when Ty Lee was jumping) she hit the earthbenders' rocks at eachother if they came from different directions. Dodging, attacking, dodging attacking. Maybe she killed, or parylized like 5, and let the other 15 hit eachother through dodging.