this is a funny question to ask me.
I learned that average musical power and recording crest factor should be taken into consideration when setting amplifier gains.
I learned that when setting up an AutoCAD .dwg to be referenced into a Revit project that you need to reference it from the view, not the sheet, and that you need style-based plot settings in order for lineweights to transfer properly.
I learned that a school we designed that is in construction has a consistent broadband noise problem from 1kHz-2kHz (octave bands and encompassing 1/3 octave bands) that I suspect is due to air velocity and diffuser NC rating.
I learned that if you use the
#1 guide to shave your balls, they will itch immediately, which doesn't happen if you use a
#2 guide.
I learned that my neighbor's motorhome combines 5
#1 2 THHN wires using a soldered set-screw coupling, thus combining all receptacles on a single breaker and giving me a good place to add GFCI protection.
I learned if I tighten the nuts holding the casters on a cart that I use to cart around audio test equipment that the casters don't want to turn. I learned that they are shytty casters.