It Looked Like a Normal Shark Until Someone Filmed It

20 Scariest Shark Sightings Ever Recorded. In this world, many things can be considered nightmares. However, for some people, the scariest thing of all is the thought of being attacked by a shark. Shark sightings can be extremely varied. Some sharks are simply curious and will swim up to humans to investigate. Others are more aggressive and may attack if they feel threatened. Join us, as we explore the twenty scariest shark sightings ever recorded. These encounters will make you shiver with fear, but will also teach you a lot about these amazing creatures.