My family was talking about what they thought was the most untrainable animal (because Sister A brought up how people claim cats are). She got talking about how smaller animals were easier to control and I came up with a humorous counter to her argument.

"Oh yeah. Try training a Spiny Sea Urchin. If it disobeys, just slap it." If you don't know why that would be bad, look up the SSU. Also, what do you think is the most untrainable animal?