As any lawyer will tell you, eyewitness testimony is the least reliable evidence. Our eyes play tricks on us, and it's not always possible to understand exactly what we're seeing. But sometimes you have to trust your senses and hold your ground when nobody else believes you. You might just be right. 

These 22 people saw highly improbable and mysterious things, and no matter how doubtful their stories were, they knew what they saw and are standing by it. One person described seeing a mysterious outline with claws in their window at night during a childhood sleepover. Thinking they imagined it they kept quiet, until it was revealed that the friend had seen the exact same thing. 

Check out that story and 21 others highlighting improbable and impossible things that people swear they saw.