I grew up in Altus OK and would see at least a dozen every year. I watched a large one hit Altus AFB in the early 80's from the back porch with my Dad. Tore that base apart. Picked up a C-5, spun it 180 degrees, moved it 200 yards north on the flight line, and rammed it into anouther parked C-5. Leveled 3 barracks, the Commisary and Exchange were destroyed, and it tore the roof off the largest hanger on the base. We had hail the size of grapefruits. It was pretty wild watching that one.