I believe that J.K.Rowling left us hidden clues in the Harry Potter books, suggesting that Severus Snape is indeed a closet Animagus and takes the form of a spider. Watch the video, read the clues and make up your own minds on whether you believe it to be true or not. Everything fits. I wrote the original theory two years ago. It’s my most famous blog post, so I decided to turn it into a video.
For a more detailed look at the clues, check out the link to my original post:
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