Two more major brands are getting in on the whole prankvertising thing - punking customers for fun and profit.

First, the Head & Shoulders promotion pulls a hidden camera fast one on young men out on a first date with a snow princess, judging from the flakes falling from her head.

From all appearances, the guys acquit themselves well.

Meanwhile, Ronald McDonald's has decided to play mind games on passersby who are asked to snap a photo of a couple. A poster of a Big Mac is carried past them to cause a distraction while the female half of our couple switches places with another person. Will the unsuspecting dupe even notice?

It's only February, so just think of what brave brands will be pulling on people on or around April 1.

But before you try it yourself, be sure to check out our three important rules for successful prankvertising.

Read more on the Head & Shoulders prank here.

And read more on Mickey D's mischief here.