I was attending Texas Tech on May 11th, 1970 and was working at Serve-U-Food which was located on 4th north side, maybe 1 block east of University. Two tornadoes passed, one took the roof from the apartment across the street to the sound and blew it into the front windows of the store. Afterward people came by looking for flashlights, medical equipment, etc. the maybe 5 minutes later the wind picked up again so we went back into the remains of the store and lay down in the same place where we had been before.