My cat just came up to me, acting like he wanted a pet. *petpetpetOWGODWTFWHYAREYOUBITINGMEGODDAMIT* Then he walks away like nothing happened.
...
This is actually rather normal for cats.
My cat does that. All the time. ALL THE TIME.
Sometimes he likes attacking people when there backs are turned. Someone will be walking, he;ll strike, they'll scold him, he'll strike again. It ends with the person staring at him while they back away slowly.
Cat will meow for food one night, then attack my brother the next, and when we turn to look at him he just menacingly meows as if to say, "You'd better get that goddamned tuna or he gets it!"