GIFs don't have sound, but a massive amount of people claim they hear something when they watch a certain GIF.
It's a clip of two high-voltage wire towers using their power lines as jump ropes while another wire tower hops over the cables.
It's a cute, silent GIF, but what is crazy is the sound that's seemingly made when the jumping tower hits the ground:
Did you hear it? If so, you aren't alone. In one study, 70 percent of participants admitted to hearing a thudding sound as the tower hit the ground.