Have you ever come across a ghost or what you thought was some sort of paranormal activity? You're not the only one. According to the Pew Research Center, about 18% of the U.S. population claims they've seen a ghost at some point in their lives. Here are some of the most common types of ghost sightings.

This is probably the most common type of ghost that people claim to have seen. These are usually ghosts of deceased people or someone you once knew in the past. In some instances, they can be family members or historical figures. Interactive personalities can be friendly or not. They often show themselves in a variety of ways. Some speak while some just make strange noises. Some people claim to have been touched by them. They probably do this as a way of letting you know they are there. It's thought that these ghosts retain some of their former personalities and can feel emotions.

Have you ever seen a mist that almost looks like it's swirling? You might have unknowingly come across a ghost mist. This is a vaporous cloud that usually appears a few feet off the ground. These mists can move very fast, however, in some instances, they just stand still. Many people have managed to capture them in photographs and on video. They are usually white, black, or grey. Sometimes ghostly mists appear briefly and then turn into a full-bodied apparition. A lot of people claim to have seen them in graveyards and around historical sites.

These are some of the most photographed types of ghost sightings. Orbs, as you might have guessed, appear like balls of light hovering above the ground. A lot of ghost hunters notice them in their photos. It's thought that orbs are souls of dead human beings or animals that have passed but have kept traveling from one place to another. It's thought by some that this circular shape is the form that most ghosts take before becoming full-bodied apparitions. They move very fast and are usually white. In some instances, they can be blue.

These are some of the most common types of ghost sightings. Have you seen a ghost before? Join the team at Texas Ghost Tour and you just might be a part of a sighting.