The moment he fully recovered from overheat, Joseph used fly to break his fall such that the impact would not hurt him.
Once he landed, he quickly looked around for any immedeate danger, but was interrupted by the sudden acceleration of the ship.

With none of his suitcases having fallen down, he knocked away anyone who he noticed had noticed him. After that use of the gravity slingshot Joseph jumped up, using the upwards momentum in combination with his flight ability to fly back up through the hole he fell down.

While coming up through the hole, Joseph was facing where the two other divers were moving before he used his emergency skill. If they had not run off, he would knock them over with one more use of his gravity slingshot before landing on the floor, picking up his suitcases.