In 2016, Google created a slightly unsettling video, titled "The Selfish Ledger," that imagines a future where an evolving record of our online data could be used to direct human behavior. It was created by Nick Foster, Google's head of design at their research-and-development division, X, and says this could be used so it not only tracks our behavior, but offers direction towards a desired result. "We understand if this is disturbing - it is designed to be. This is a thought-experiment by the Design team from years ago that uses a technique known as 'speculative design' to explore uncomfortable ideas and concepts in order to provoke discussion and debate. It's not related to any current or future products," said a company representative. Click here for the first image in today's viral picture gallery. Continue reading for the five most popular viral videos today, including one showing how high-speed movement can forge metals, which is also known as friction welding.