Forgotten Voice

I was part of a group which ran MVS tuning workshops and we used the computer room at Hursley. The people on the course were divided in teams and the last part of the course was a competition to see which team could achieve best performance using a set benchmark of jobs. It was getting late on Sunday night when the last team were making their final run, the system stopped. We were all gathered round the system console counting the jobs completed. A head appeared above the console, we all jumped up, it was one of the operators who just removed the disk from the machine on which we were running the benchmark. He was not very popular.