Its side to side as well as back to back swing direction is favorable to the entire user. (babyambition.com)
Maybe some side missions about what happened with Covenant and Brutes (perhaps flood was busy there) while Cortana has everyone tied up and Flood comes back swinging with everything else now in a weakness state. (n4g.com)
So if I don't answer the front door, know that I'm probably around back swinging on the back porch waiting for you... (stonegableblog.com)