"A manager, who wasn’t very familiar with word processing, left his monitor unattended on April Fool’s Day. I went into his settings and programmed ‘the’ to autocorrect to ‘I am a dumb@$$.’
It took him hours of trying to avoid ‘the’ in emails and documents before he finally called helpdesk. He laughed about it later. DAYS later."
If it is really old and rusted pipes it can happen randomly, but typicaly after peaking pressure that will rattle the dirt in the pipes loose. Reconstruction where the pipes are knocked can also do this.
I don't think mom actually immediately thought of the exact cause, people...
She just thought something was obviously wrong which was the whole point. Best to move on, future plumbers.