As I tried to say, I'm rarely on the side of cats, but when something like this enters your house (their territory), I think it's normal for them to act weird, even if all
they did was sniff near it. It could have made the snake panic & try to go thru something it shouldn't have without even touching it. If a wild snake ever got into my
house, I'm pretty sure my dogs would have acted a little strange knowing it was there, but they'd not have done more than look & back away too...they've seen me
holding snakes for years, & been allowed a sniff on the tail end, with no attempts to hurt them, & even a little fear (-my smaller dog). Snakes move differently than
lizards...cats (& many dogs) are far more interested in quick & jumping lizards, & get spooked a little by snakes. Not always...but this just doesn't look like "the cat
did it" to me?