It's a backroll to revert, the 180 was just early so it looks like a 180 to switch tantrum. A lot of pros do this early 180 style on their backmobes (ex. Erik Ruck, Rusty Malinoski)
Just because he does a backflip doesn't mean it's not a backroll. often times people let go of their back hand doing backrolls and do a front flip motion against their direction of travel and it's still a backroll. If you want to see a pro do this exact trick then watch 2:29 of Steel Lafferty's new video. It's actually the banger for the video.
http://www.alliancewake.com/wake/steel/