Murphy’s Law
The law’s namesake was Capt. Ed Murphy, a development engineer from Wright Field Aircraft Lab. Frustration with a strap transducer which was malfunctioning due to an error in wiring the strain gage bridges caused him to remark – “If there is any way to do it wrong, he will” – referring to the technician who had wired the bridges at the Lab. I assigned Murphy’s law to the statement and the associated variations.
— Wikipedia
What is an example of Murphy’s Law?
If you plan a picnic, Murphy’s Law means it will rain on you. If you speed up to pass a slow driver, Murphy’s Law says there’s a state trooper just around the corner. The way most people refer to Murphy’s Law is a combination of bad luck and pessimism.