I believe it's also called "murphy's law".

My son (38 years young) and I were bashing on our new lay out track when his steering servo gave out. ( he has a non Traxxas SCT)
I had a spare Traxxas servo (2075) and gave it to him to use. I told him I have "never" had to replace a steering servo in any of my Slashes. And while he was making the repairs I contuned to pratcice on the new lay out when..... murphy's law went into effect... The steering servo broke in my Slash...

Just saying, never say "never"