We tried to tip one while out 4-wheeling somewhere between Salt River & 4 Peaks outside of Phoenix. The lead to the battery on the truck had apparently burned thru. So while we were looking at it under the hood of the Bronco of this guy I was dating at the time, there were some cows standing in the scrub near where the truck choked. So being the idiots that we were, we decided to wait on the battery & go see about tipping some cows. My friend, Bill, went up to tip the nearest one, but apparently he woke it up and while Bill was reaching over to "tip", the cow gave him this look like "GO AHEAD... MAKE MY DAY..."
We went back to messing w/ the car battery. That whole day was one of those retarded adventures that you're really amazed that you survived, but it still makes for a great story when you're drunk.