Just in time for St. Patrick’s Day, there’s a viral video going around showing the unwashed masses how to “Pour the Perfect Guinness from a Can.” The video, which leads this post, is perhaps the most concise, useful tip going into this weekend’s green theme, so much so, in fact, that since the video’s posting–March 13, 2012–the 30-plus second clip has garnered over 100,000 views.

The process of pouring the perfect Guinness looks pretty simple. It has nothing to do with the angle of the can or the glass it’s being poured into. Simply put the can directly into the glass and let the liquid fill up the glass. Once it reaches the can and “the avalanche of bubbles settles,” pull the can out and let it finish filling the glass. The result? A gorgeous glass of beer with the perfect head on it. Considering the weekend’s festivities, I wonder how many people will be trying this at home? I just hope they post videos of their attempts.

Speaking of St. Patrick’s Day, Twitter is in the mood for beer-drinking fun:

Actually, considering the video, forget about that. Drink all the perfectly-poured Guinness your heart desires. Just don’t drive.

Now that’s how you endorse a holiday that encourages abject inebriation. Granted, the history of the holiday is a little more than wearing green clothes, drinking green beer and eating cabbage, but these are the reasons it’s so popular, especially in the United States.

Just remember, designated drivers are your friend.