One user posted a black and white photo of workers at a flax factory in Belfast in 1900 and asked others to guess what was unusual in the photo.
According to Sputnik, people started chatting enthusiastically, and a commentator discovered a lonely hand on a woman's shoulder.
Most of the people in the photo pose in a brace-shaped manner, so the hand on the shoulder of that woman certainly does not belong to anyone in the photo. The colleague standing behind the worker also put her hand in front of her chest, so this could not be her hand.
Only one female worker let her arm off, but her position was on the left side of the photo, while the other mysterious hand appeared on the left.
The mysterious discovery scares users, some people think the photo is evidence that supernatural forces really exist.
"At the place where I was late, I was about to go to bed when I saw this photo, which panicked me" - Rookie93 wrote.
Oh, that scary hand dont know where it came from, commented tchyfinger.
"Now I will have to leave my sleeping light" - the cheesymay account complained.
Meanwhile, the opposing side said that this was just a photoshop game.
"Maybe photographers have reused old film to cut costs because at that time the cost of taking photos was not cheap" - one writer.
