We had something on those lines. A dev company that was hosting one of our servers. Their monitoring server started pushing out alerts of failing kit. The engineer logged in remotely and rebooted the kit and went back to sleep.
We woke up our account manager at 8:30am to tell him our server was down, and so was their website and probably all their other clients. They had an air-con fail (they only had a single unit we found out later). No more alerts as the monitoring server was now fried!
We soon moved the box out of their hands.