This video is from a police officer's dash cam in Texas. According to a news story from USA Today, the clip from November of 2009 shows Officer Keith Urban during a traffic stop near an old farm. Urban was in the middle of writing a ticket when a cat just walked up to him. The officer tried to ignore the cat, but the cat proceeded to climb up him to get his attention. 
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Urban told the paper later, "I think the driver of that vehicle was laughing a little bit ... And the driver even offered to get out of the vehicle and remove the cat." He felt bad for repeatedly shooing the cat away, but that never discouraged him from coming back. 

Check out the video to see what the cat gets up to.

*This video has no sound.