I can't believe no one in the comments has told you yet. I want to tell you because I just learned about it last week! It's horrible! A man in Russia, only legs & feet in the camera frame, squatted over an empty glass jelly jar with the lid on it, tons of lubrication, and he kept going until the entire jar was fully inserted in his rectum.
Then you can hear an explosion sound. But it was an implosion sound. It was the sound of the jar being crushed & glass shattered inside of him. The man didn't make a sound. Complete stoic silence which lends more creepiness to the video.
Then we see tons of blood dripping out of him, down his legs, all over the floor. The man starts manually digging glass chunks out of his asshole. That's all I remember. I never actually watched the video myself but that's the description.
Follow up: he never went to the doctor for this injury because he says he didn't want to deal with the embarrassment. He had some scarring. He says he healed within a couple weeks. He says he has no regrets. He makes tons of fringe kink videos, this was apparently nothing unusual for him. But he waited until the event was far enough in the past before he posted the video online, over a year after it happened. It happened in August a few years ago. He posted it in December a year and a half later.