Quote Originally Posted by Paul in NZ
you drop said part (which then turns out to be made of unobtainium) and you distinctly hear it hit the garage floor but... Its gone and no matter how hard you look, it cannot be found (until you purchase or make a new one)
Mechanics Ode:

Twinke twinkle little part
How I wonder where thou art?
I heard you roll across the floor
I searched for you....
you are no more