Humans are dangerous, even humans who study plants makes sense to him, but the idea that another plant might try to use his powers to blow things up is a whole new kind of scary thought! It wouldn't even have occurred to him to think that another plant might do that to him, or to Nai...

..Or to Shardik? What was that he'd said, he didn't really have a lot of control over what he was doing? Vash thought he'd just meant that he'd been trying to be big for bigness sake, just showing off, but maybe that's not what he meant?

"Was that what happened to you?"