Say your not as dumb as you look

Hmmmmm... ive heard this quote before but im not sure if its originally from this actor. he probably said this is one of his cowboy movies. for someone not to be as dumb as they look would be hard because you would have look really dumb for certain people. a good example that i could think of is if someone that is far but within ur sight waves at your direction and you wave back thinking its for you, when it turns out it is to the persons friend behind you makes you really look bad O_O. this happened infront of m a couple of times but thankfully never to me. once it happened to my brother in class but instead of being far the person was close and said hi to a friend when he replied hi. . . i then told him that the hi wasnt for him and he got very embarassed and i made fun of him for that for a while. i cant think of any other times this happened but im sure that it did. actually, it might have happened to me before but i dont remember it happening. another example is when you think you heard someone sitting behind you call you but they really didnt and you turn around asking them what they want and that is really embarasign because you usually know the person sitting next to you.