An interesting law : Murphy's Law

"If anything can go wrong, it will"
Murphy's Law i s attributed to USAF Captain Edward Murphy, a research engineer at Edwards Air Force Base in 1949. Upon learning that a rocket sled test failed because a technician wired the sensors wrong, Murphy is reported to have exclaimed, "If there is any way to do it wrong, he'll do it." For some reason the phrase caught on and began evolving. The press got a hold of it when during a press conference the man who eventually rode the sled commented that the reason he survived is that everyone on the project paid close attention to "Murphy's Law." When asked to explain he used the form we're familiar with today.