I am a keen mushroom hunter and would frequently collect what is available. Every so often a new type shows up and today I bumped into Potato Earth Balls, which I did not know, but they looked delicious and I brought them home. Luckily, before I could cook and taste, I identified them as Scleroderma bovista which are poisonous. I had a suspicion that they were probably not good when I cut them and the inside was a dark purple.
I shall live to try another some other day