My technique of Silicon Molecular Beam Epitaxy is built around ultrahigh vacuum chambers which, after a huge amount of work, can pump down to a millionth of a millionth of atmospheric pressure. Based on my patented design, a British firm (Vacuum Generators) built for me the prototype of a multi-wafer production machine. When complete it was crated up and flown across the Atlantic where one of their people (Dave Roughley) and I worked for months to reassemble it and certify its operation. As a part of that operation, cooling water was piped through a few objects within the vacuum chamber. The water was NEVER supposed to get out but one day, returning from a coffee break, we looked in through a window to see that the chamber was half filled with water (a water line had burst). We didn't know whether to laugh or cry ... but after a sober week (spent draining and cleaning the system) we chose the former course: Dave and I, in suitable gear, climbed inside the system and posed for this photo which we sent back to Vacuum Generators as a non-progress report. They were not amused.