This kind of alien worm can grow everywhere, including other living creatures.
Luckily for Romuald, his stretchy body can survive that kind of stuff, avoiding him a painful death. Unfortunately for him, his stretchy body can survive that kind of stuff, forcing him to stay alive despite the creature growing enough to outstretch his body enough to make it rip, turning him into nothing more than a fleshy husk for the worm, unable to get rid of it, nor move by himself anymore.
His legs and arms struggle vainly to free himself, clawing against the worm desperatly, but the creature's skin is too thick and rubbery for him to make even a small scratch.

To his horror, he can soon feel the worm growing some more tentacles right inside his limbs, pushing further and further, making them bulge and stretch...