I was stationed in Europe from 70-72. Listening to Pink Floyd was a way of life, while living in the barracks. I rotated back to the states in 72. My next duty assignment, was Ft. Huachuca, Arizona. To my glee, Pink Floyd's world tour was ongoing, and coming to Tucson.. I was able to get a ticket for the concert in Tucson, September of 72. I've attended many a concert throughout the years, but this concert was the most memorable. Back in 72, there was festival seating, so when those doors opened, everyone rushed for a spot on the floor, those who didn't brave the rush, sat in the arena seats. When the band came out, the very first thing they did was take a deep breath and laughed. Don't know what they've could've been inhaling. lol. Towards the end of the intermission, everyone on the floor was chilled, then a faint sound started to reverbrate throughtout the arena. It was a heartbeat, but so faint that people were kinda just looking at each other and themselves depending on their situation. What I didn't notice, there was a guide wire running from the center front of the stage to the rear top of the arena. As the heartbeat grew louder, everyone started to yell, arena went dark, then out of no where a small object, light shining on it, looked like a plane, came down the guy wire and crashed into the stage with a huge explosion, simultaneously the smoke generators kicked in along with the lighting effects on stage. Through all this, their stood the band, seeming to appear out of nowhere. What a concert!!