My last employer had a customer install his own motor that he built, upon initial start up the N2o system activated and blew the crank out of the pan!
His buddy stopped by first thing in the morning and told my boss his "friend" was going to try saying the machine work was wrong, causing the crank to sieze so violently it broke. Sure enough right at closing the guy shows up, my ex-employer was so cool he looked at it (in the trunk of a car)and said, "oh I have seen that before, pre-mature n2o injection, that's a bummer." Then picking up a head he told him it'd only be a couple hundred to "fix it up." He naver gave the customer the opertunity to "lie" get angry or anything, he grasp the bull so to speak.
Drag racers prayer:
As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my ride." -Amen