Cow Tipping - Is it real?

The following was taken directly from wikipedia. The content may or may not reflect my own personal opinion:

Cow tipping is an activity performed by sneaking up on an upright cow and pushing it over for fun. The popular explanation is that the cow should be sleeping; in reality cows do not sleep standing up.

According to popular belief, cows can easily be pushed over without much force because they are slow-moving, slow-witted and weak-legged, have a high-centre of gravity and sleep standing up. However, in reality, there are factors that make success in this effort very unlikely, which is why many have termed cow-tipping an urban legend.

A variety of calculations have been performed, sometimes with humorous intent, to determine if cow tipping is physically possible.  A study from the University of British Columbia concludes that cow tipping by a single person is impossible.

Some consider the attempt to practice it an act of animal abuse. In 2004, a Florida legislator proposed a ban on “cruelty to bovines”, which, while not specifically addressing cow tipping, included language that would apply to the practice: “A person who, for the purpose of practice, entertainment, or sport, intentionally fells, trips, or otherwise causes a cow to fall or lose its balance by means of roping, lassoing, dragging, or otherwise touching the tail of the cow commits a misdemeanor of the first degree.” The proposal did not become law.

From Wikipedia, the free encyclopedia

All of the above may or may not be true. If anyone has actually done any successful cow-tipping, please leave a comment. I would especially be interested in photos and/or videos.