One night my two cousins were spinning the night with each other, and they didn't have cable so they just went to bed. About 5 minutes later, the whole room lit up red, and my grandma appeared in a red dress then left. The scary part is, she died years earlier.
The next day, my dad and my aunt were sitting on the couch, when all of the sudden their dog just started barking. They both looked to see what he was barking at, but when they looked nothing was there. It was like he was barking at an invisible person. That's when they thought back to when my 2 cousins saw my dead grandma. They thought she had come back again, they just couldn't see her.