After landing, around 36m56s, the cold gas thrusters fired at the top, and I think it's to keep the rocket steady. https://youtu.be/sh8V0COrrzE?t=36m56s https:

After landing, around 36m56s, the cold gas thrusters fired at the top, and I think it's to keep the rocket steady. https://youtu.be/sh8V0COrrzE?t=36m56s https://youtu.be/sh8V0COrrzE?t=36m56s