I have a fox terrier. Hes a smart little bugger and he knows it. I have numerous examples of him outsmarting people, but the one I love to tell is him outsmarting my wife.
She was sitting watching TV eating her dinner, it was a steak and some vegetables. Usually we are bad and cut bits off for the dog to eat with us, but she was hungry and it was only a small piece of steak so tonight the dog got his own meat and none of hers. He likes steak.
He watched her eating the steak and asked nicely if he could have some (he will pat your leg to remind you he hasn't had any yet). After being told no several times he got grumpy and sat down for a bit. All of a sudden he starts to bark loudly and growls and runs toward the front door. My wife jumps up putting her dinner down on the couch and runs to see what he is growling at. He sneaks past her as she runs down to an empty door. When she returns the steak is gone and the dog is no where to be seen.
He has tried this same trick again on her since then but she remembered to put her dinner higher up where he cant get it. He tried it on me and promptly got told to shut up, so he came back and sulked in front of me.