"Try not to laugh or grin" is a naming convention fad of some Youtube videos, popular particularly in October of 2008. Each video is different, and there are some variations in title. Although the concept is similar to the You Laugh, You Lose meme present on 4chan, it is unclear whether this fad came from the 4chan meme, or if it is an example of convergent memetic evolution. On October 6th, 2008 a Youtuber by the name of Gmaerking310 uploaded a looping video of the Dancing Stormtrooper entitled "Try not laugh or grin while watching." The video has around 700,000 views which paved the way to millions of other fantastic challenges of such kind, and here's one of those. Enjoy!