Next time I try and explain, "if a friend jumps off the edge of a cliff..do you follow? Of course not!!" I should use more specific applicable terminology. Like, "if a friend sticks his finger in the pencil sharpener and then tells you to do it, do you follow?".
His response: But I wanted to see if it would sharpen my nail!
Me: Did you know that there are blades inside the pencil sharpener?
Him: (eyes big and wide). Oh. Can I have a band aid please?