My cat isn't very smart. He isn't very smart at all.
He kept trying to go on the table to eat the leftovers. Since he'd attempted it about 6 times within the space of 30 minutes, and nothing else had worked, I bopped him on the head with my fingers.
Having a very thick skull, he was mainly startled by the sound, and looked around in confusion at where the sound had come from.
Me and my roommate almost died laughing. The sound! He didn't even notice my hand. Just the sound!