i was a very early employee at one of the first two commercial US ISPs, UUNET.
all of us were using cisco routers. there was a bug where at about 24-26 hours, the BGP session in them crashed, causing waves of BGP convergence issues, affecting all the tier 1 providers.
the solution was to reboot carefully at about 22 hours. we waited desperately for cisco to get us a patch.
we were at a usenix conference in the terminal room at about 11pm when we got an email that they'd isolated the bug and thought they had a fix. at this point, the senior router folks for UUNET, MCI, and Sprint sat in the terminal room, waiting.
about 1:30am we got email that tony thought he'd fix it. we asked how much testing he'd been able to do.
tony: "it booted in the lab"
us: "we'll take it!"
then, all 6 of us downloaded the code and proceeded to reboot about 70% of the internet backbone to start using the new code, all of UUNET, MCI, & Sprint.
fortunately, in those days, cisco let their senior engineers talk directly to customers and they got things fixed fast.
this never made the newspapers at the time. i can't even imagine any ISP these days allowing engineers to reboot their entire backbone from a terminal room with code that "booted in the lab".
kind of miss those old days.