If you are interested in watching videos, which are based on the theme of optical hallucination then this is the article that you must check out. A video has been attached with this article. Once you start watching this video, you will feel like you are looking at an illusion. This is an interesting video and one needs to see it more than once to understand the main theme of the film. To get more information on this particular article, you must click on the link that has been given over here.
(Source: ScienceForum via: Laughing Squid, boredpanda)