Again, when I got home, another cat walked up and Toby started hyperventilating.
This other cat was black and white, had a really skinny and somewhat deformed face, and had a collar that said, "Boo." It was really sweet and let me pet it, but Toby was still being unaccepting.
I had to go back, put Toby in my lap, and attempt to calm him down. He kept being nervous, although Boo was long gone... Toby's still outside growling...