In the early 1990's, we started a study of the very shortest time duration GRB (VSB) to search for possible evidence for primordial black holes as suggested by S. Hawking. We have studied all this BATSE, KONUS, Phebus, SWIFT, etc. Very short GRB's, there are some very unusual properties that could be considered with PBH evaporation in this galaxy. We will describe these properties in this talk.