Last spring, aging equipment was replaced in the Network Operations Center (NOC). Four closet-sized rectifiers and a large transformer (whimsically dubbed "Old Sparky" by the NOC team) were unplugged and unbolted, then carefully scooted out of the building, to make room for new replacements. The changeout was scheduled for the middle of the night during Spring break in case anything went wrong, but happily, everything went according to plan.