The Teslarati article SpaceX’s latest Falcon 9 booster returns to port as NASA hints at “vested interest” shows this tweet about booster number B1056 from Jennifer Krafft Photography:
#SpaceX #Falcon9 on the droneship in Port Canaveral giving us a show. Not sure why exactly this is happening but it was cool sight to see!
One of the three photos is shown below.
What's going on here? What's burning (if that's what's happening), and why is it being done in Port Canaveral?