Monster deaths should be dramatic - at least in games where the heroes aren't actually just kicking in dungeon doors and killing monsters repeatedly every session. If the adventurers are in an epic encounter with a significant monster, then the moment when they prevail and the monster expires is a major story point, and so should be treated with some narrative niceties.
Describe the monster's death throes, the roars of agony, the gouts of blood spilling from its wounds, the convulsions of death that shudder its spent body, the slam as the heavy mass of flesh hits the ground. Give the players time to catch their breaths and slowly realise that the fight is finally over, as the monster exhales its last.
The death scene should be as epic as the fight that preceded it, as a general rule.
Rejected strip title: Non-Flying Spaghettified Monster
Commentary by memnarch (who has not seen the movie)
Okay, so it definitely looks like this hyperdrive modulator doesn't mind obstacles being in the way. Luckily for the party, rathtar tentacle monsters are much more squishy than junky spaceships. And that the Falcon was pointed at the exit. And that there weren't any other ships in the way outside the hangar. And no other immediate side-effects for the first hyperdrive use with the new modulator.
Looking back on the whole scene from the last week, I actually assumed somewhere that Chewbacca had been told that the experimental modulator was installed. Ben is very good at separating player/character knowledge. And if hyperdrives are well-known to not function in situations like this, Ben isn't going to say anything OOC that would indicate otherwise. Heck, he's been active in trying to keep it separate for the others both IC and OOC!
Movie-wise, I'm wondering if the Millennium Falcon actually flew out of the hangar before making the hyperspace jump. The forcefields that hold the air in or sudden acceleration out of the hangar could have left the rathtar behind, then the ship could jump like normal. Sure, it could be more cinematic if the jump occurred from inside, but there's also a good probability that this experimental hyperdrive is the new Orb of Phanastacoria equivalent. That would be a lot of changes to speculate about if true, like why was Rey digging around in a dead star destroyer in the first place?
Commentary by Keybounce (who has not seen the movie)
[Keybounce's comments will appear here when received.]
Transcript
GM: Guavian gang members arrive and start shooting at the Falcon.
[SFX]: Pow! Pow! Pow!
[SFX]: glurp! cthuul! {the rathtar is still wrapped over on the cockpit}
Yanni: Where’s the hyperdrive?
Rey: It’s over there, but it’s not going to help. We need—
[SFX]: klik {Yanni hits a control}
[SFX]: Slurp! Chew!
[SFX]: Spletch!
GM: Time stretches like spaghetti as the Falcon accelerates, splaying oozy rathtar innards across the viewport.
Rathtar: Arrrghhh!!! Pain!!!
[SFX]: squelk... sliiime...
Rathtar: Where have you come frooo—?!
[SFX]: Woooosh! {the Falcon jumps to lightspeed}
Rey: We all wonder that whenever Yanni does something.