Hissing seems to be part of normal communication between Oswin & Fezzik. He gets in her face; she hisses at him; he backs off. Five seconds later they’re grooming each other.
When @quantcat hisses, though, it means something different.
Ceejbot's mastodon instance. This is an overprovisioned, personally-run instance running on AWS. I welcome friends to create accounts here. I intend to run it as long as people are using it.