Reply to post: Re: Alien Space Bat at 54:19

Watch it again: SpaceX's boomerang rocket lands on robo-sea-barge

Hopalong

Re: Alien Space Bat at 54:19

Most likely venting unused LOX as a part of the procedure to safe the stage. You do not want the stage to explode due to over-pressure of oxygen as the remaining LOX boils off. Especially in a Geostationary transfer orbit.

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