The sound of the door being torn apart followed by the sound of the smoke grenade hitting the floor told Joseph Leidner that his escape route wasn't clear yet.
Not knowing what exactly was thrown into the cabin, but also expecting projectiles to fly his way soon, he activated his Event Shield, protecting both him and the suitcase he was almost done packing by now.

As the harpoons that were heading for Joseph or the suitcase behind him made contact with the Event Shield, some shattered due to the extreme force gradient of the shield, their pieces flying around the room as shrapnel, some back at the door. Other harpoons were 'merely' bent, while a few were deflected without visible damage, before they continued on a strongly altered trajectory, impacting the walls, ceiling, floor or some furniture in the cabin.
As the barrage was nearly over, Mr. Leidner finished packing, the locks of the suitcase audibly clicking into the locked position as he closed it.

Knowing he could not keep the shield up for long, Joseph started charging at the door after the barrage was over, he could not defend a dead end forever, he had to get offboard, or at the very least to some safe place on the ship.

As the cabin was rather small, it did not take long to reach the door, at which point he deactivated his Event Shield, as he did not want it to tear up his luggage. Besides, a shield facing a hallway's wall is useless when your enemy is in the hallway.
Joseph also pulled his recently packed suitcase ahead of him, such that he could toss it to the left once it passed through the door, while at the same time tossing his first suitcase to the right. In the narrow hallways of the ship dodging those suitcases should be impossible.

And so he did, as the second suitcase passed through the door, it was tossed to the left, mowing down any diver it hit with its sheer mass, just like the first suitcase which was tossed to the right at the same time.

Once through the door Mr. Leidner immedeatly turned right, as he recalled it to be the quickest way to the afterdeck of the ship. He hoped to not find too many intruders there, as he expected most passengers to have been near the front while the ship headed to port.

Having turned right he could easily grab his first suitcase again, at which point he looked back to locate his second suitcase, so that he could toss it his way again. He was not about to leave his luggage behind.

Joseph Leidner had to avoid further combat if possible, the Event Shield had used up most of his EP.