Not really anything special. When people are hungry, truly hungry and not just "oh it might be time for the next meal" they will try just about anything.
There are toxic/noxious things that humans have found ways to prepare in a way to eat (acorns, fugu, yuca, various beans when raw, some raw or underripe nightshade veggies - eggplant, potato, tomatillo). Even mushrooms have a risk because there are look-alikes, so if you're foraging and not 100% sure you have the right mushroom it's best not to eat it.
There are toxic/noxious things that humans have found ways to prepare in a way to eat (acorns, fugu, yuca, various beans when raw, some raw or underripe nightshade veggies - eggplant, potato, tomatillo). Even mushrooms have a risk because there are look-alikes, so if you're foraging and not 100% sure you have the right mushroom it's best not to eat it.