Here's a tip for cow tipping from TheRussianBadger.
"So if you see Otis from Barnyard, make sure you blast his ass from a distance!"
Listen up, buttercup. You see, "cow tipping" is when you sneak up on a sleeping cow and push it over, right? But Otis ain't no regular cow; he's a bull from that "Barnyard" cartoon. So, the joke is that instead of tipping him, you gotta "blast his ass" which means to shoot him from far away. It's funny 'cause it's unexpected, and violent, and you probably thought cow tipping was real.