...or "the UPS batteries caught on fire", or "the first unit failed and the contractor who was supposed to replace it replaced the second one instead, resulting in an outage".

Or something as stupid as, "vendor requires $50 failed DIMM replaced under warranty to be returned by UPS instead of chucked into the e-waste bucket, but UPS cannot pick up from DC because the driver can't be bothered to ring the bell on the DC gate".

That one alone probably resulted in our longest ever ticket.

The physical world sucks.