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)
Random one recently:
Turned my gaming box into an impromptu audio mixer by connecting my PS5 audio into the line in and routing it with pipewire to the speaker output so I could game while watching endurance racing on the same speakers.
Later found it was easier to do visually with qpwgraph.