I now suspect he made it up for devious reasons, but I had a professor who told about the time random characters and cursor movements kept appearing during data

I now suspect he made it up for devious reasons, but I had a professor who told about the time random characters and cursor movements kept appearing during data input from a lady at a remote office at his org. Phone support couldn't solve the problem after many tries, including asking her to try a different work-station. So they flew in a technician. The technician arrived and sat to observe the lady as she did data entry. The technician eventually realized her rather large breasts were bumping the keyboard from time to time.