Skittles was watching out the patio door as some little birds were eating at our feeder. Suddenly, he backed up and charged. Luckily for the birds, the door was closed, and Skittles didn't get through. He made a loud thud as he hit the door, stopped and looked around like he didn't know what he just did.
This wasn't my cat but I was playing with my neighbors' cat and was moving the red dot from the cat laser toy across the wall. As I moved the laser higher he jumped on the table and in the process of trying to 'catch' the dot leapt and slammed into the wall, then ran away. Of course he was ok, but I wished that I had caught that on video!