Then relax, or you might set off my own bloodlust.

[ But Kojirou does seem to relax a little, just a hair of tension leaving his body. He seems to have some control over his own faculties at least, and isn't going to just start swinging. ]

If it wasn't a trap then what was it? I doubt someone who dares to call themselves a swordsman is the type to trip over nothing and fall into a river.