If you've got an Internet connection and an e-mail address, then someone – friend, family or co-worker – has probably let you know about somebody doing something that you just have to see.
The CBSNews.com staff came up with a short list of viral videos that have ended up in our in-boxes. Click on the links below, and the videos will play in a new window.
Almost anything can catch become a "viral video" success story. This clip is only six seconds long but has become wildly popular.
The band OK Go might be one of the biggest viral successes. The low-budget video for "Here It Goes Again" is the most popular video on YouTube.com this week, and its Internet success has gotten the video airtime on VH1.
If you were ever kept up at night wondering what would happen if you put Mentos candy into a bottle of Diet Coke, viral videos have the answer.
The video doesn't have to be new to be passed around. This one is probably older than the Internet itself, but it's still making the rounds on computers worldwide.
After the amazing success of the "Saturday Night Live" sketch, "Lazy Sunday" — itself a viral video phenomenon — dozens of tributes and spoofs emerged on the Internet. Try these three for an introduction.
The Oscar-winning film "Brokeback Mountain" inspired a slew of Internet parodies. Check out the trend of remaking other movies in the "Brokeback" style.