How to Make a Black Hole Out of Anything

All you need is a bunch of mass concentrated in one place. There's something going on there that says this theory of black holes just doesn't work anymore when you get to really really small masses  something else takes over or could it be that electrons are black holes they just look like electrons from the outside to us? Mark: How would you tell how do you know what's going on inside an electron anyway if it was a super tiny black hole you just assign this charge to its electronic event horizon and it acts exactly the same way.