History NightmareFuel / Poseidon

** [[spoiler: Especially how Valentin dies.]]

* The way in which [[spoiler: Elena dies, snagging her skirt on an errant wire when swimming underwater at the tail-end of the survivors. Made even more horrifying by the fact that she was already claustrophobic and was convinced that she was going to die not 10 minutes earlier, making her previous escape short-lived. Although she's spared the pain of drowning by knocking herself unconscious, and the others do their utmost best to revive her, her last moments are of sheer distress and abandonment from the rest of the group. Adding it as {{Tearjerker}}, she was only on the ship to see her younger and ill brother, having snuck on illegally just to do so. Dylan used getting to see him as motivation for her to calmly escape the air vent, saying how she wouldn't want him to think she never came for him. This makes her death all the more heartbreaking.]]

** Above the ballroom, the surviving group stands silently and somberly listens to the people's screams as they all drown. You can almost tell how much they wish they could've helped them, but now that the ballroom – the ''only'' room that held survivors – has been flooded, the group is hit hard with realization that they've crossed the PointOfNoReturn and now there's no one left to save but themselves.

** Above the ballroom, the surviving group stands silently and somberly listens to the people's screams as they all drown. You can tell almost tell how much they wish they could've helped more, but now that the ballroom – the ''only'' room that held survivors – has been flooded, the group has already crossed the PointOfNoReturn and now there's no one left to save but themselves.

* ''Everyone'' in the upturned disco getting electrocuted to death as Jen and Elena can do nothing but watch in horror.

** Above the ballroom, the surviving group stands silently and somberly listens to the people's screams as they all drown. You can tell almost tell that they wish there could be more people left to save, but the ballroom -- the ''last'' room that held survivors -- is completely flooded, and there's NoGoingBack for the group.

* The guy who gets electrocuted in the upturned disco.

* The gathered survivors in the ballroom watch in horror as the "watertight windows" slowly crack under the unrelenting pressure. Panic builds as they realize what's going to happen, and there is no way to escape (as all of the watertight doors that were sealed earlier and the only way out of the room have now flooded). As everyone in the room begins to run around and scream in panic, the singer tearfully walks towards the captain as they prepare to face the inevitable and simply hug each other. The windows shatter and water floods the room, killing everyone. Above the room, the surviving group stands silently and somberly listens to the people's screams as they all drown.