That is definitively not the way to test mushrooms. Yes, there are mushrooms that can kill you that way, and a lot more that can seriously harm you. False more

That is definitively not the way to test mushrooms. Yes, there are mushrooms that can kill you that way, and a lot more that can seriously harm you. False morels, funeral bells, deadly webcaps, a bunch of different amanitas... in the case of deadly webcaps, you won't notice until a few days. But then you're going to need new kidneys. Basically every webcap is suspected of being carcinogenous too, and look up Julius Schäffer if you think there can't possibly be long-term effects of eating mushrooms that "seem fine" after 20 minutes.