Always say nice things to them. This notice was above the photocopier in the Philosophy Department, University of Reading
Warning
This machine is subject to breakdowns during periods of critical need. A special circuit in the machine called a critical detector senses the operator’s emotional state in terms of how desperate he or she is to use the machine. The ‘critical detector’ then creates a malfunction proportional to the desperation of the operator. Threatening the machine with violence only aggravates the situation. Likewise attempts to use another machine may cause it also to malfunction. They belong to the same union. Keep cool and say nice things to the machine. Nothing else seems to work.
Never let anything mechanical know that you are in a hurry.