Most Harrowing Experience(s) Ever with Organisms

Happened not to me, but my relative, he fell in a patch of Sosnowsky’s hogweed, had a huge born on all of his right leg, it looked awful, thankfully I only got only small spots of burns, though e.g. one brown 1sm spot stayed for 6 months, so having a full leg like that I can’t imagine living through it.