Holy cow, I wrote a book!
Some years ago, a group different from the one I worked in
invited me to "volunteer" to help them
with serious problems they were having with their product.
They asked to "borrow" me for one week so that I could
magically resolve all their issues.
I wasn't really that familiar with their product,
and I certainly didn't know how it worked internally,
so I didn't think I could actually be much help given just one week.
But they kept insisting that I "volunteer" to help them,
until I finally wrote,
I have a lot of vacation days and I'm not afraid to use them.
That one line catapulted me into thermonuclear device territory.