[If what's in Yusei's body is what he thinks it is, then he's not even sure how he's alive. There's no way that can be in a human body and have that person live. It's just too powerful a force. Too volatile.

He'd rather not think about it, so instead he focuses on Venom's story as he continues to make his way through the house.]

That's...strange.

[Yusei hesitates, thinking.]

This house is big...but it shouldn't be so big that I wouldn't hear a room collapsing somewhere. Or not see any structural damage to the house. Was it an illusion?

[An illusion strong enough to produce tangible sound, though...]

Mm. So that's something we should be wary of.

[And naturally, his mind whirls to the chances of him protecting his friend. His goopy, head gnoshing friend.]

Sound is a result of vibrating air molecules, so maybe...