For me, my high bar that I have yet to beat, was the time I pivoted the running OS (ubuntu) into RAM over SSH so I could unmount and image the boot drive without rebooting and loading a live USB (Which would have required a ticket with my provider to enable IPMI)
When I actually get an awk/sed command to work.
I’ve had the 1980’s awk book seemingly “forever”, but use awk so infrequently I always need to look things up.