I have had many unscheduled line measurement events, though...
If there was a standard UW sign for "ta-daaaa!" you would have been a rockstar.
I claim of course, that like all my "errors", they're not accidental, but deliberate acts on my part for the entertainment of others
As a salty old DM and close friend used to tell me after I'd cocked something up in front of students, "you can't bullsh!t a bullsh!tter!"
I've found my people!