This week, one Redditor posted a graphic photo of a strange blood clot that was extracted from the lungs of one of his friends’ patients. The patient’s nosebleed lasted for several days, and when he figured out that it wasn’t going to go away on its own, he went to the emergency room. That’s when doctors pulled something absolutely insane out of his lungs.

Doctors pulled out a massive blood clot that extended from his nose down to his lungs. It is a miracle he actually survived this knowing how dangerous even a small clot can be.