Please excuse my obnoxious laughing in the video.
Right before this, my fireteam mate had appeared to jump off the the siege engine backwards, crouching, and aimed down his sniper. When we got downstairs into the Server Farm, parts of his body were disappearing until I got what you see here.
Little did I know it would escalate from pinball into slip-and-slide.
By the time we made it to Aksis Phase 1, he was in full Ballerina mode.
https://www.youtube.com/watch?v=PM35PimFO-E