The first movement begins with dueling harmonies
As if slipping and clasping,
The second movement is an immediate
As the blunt metal tooth pierces the curve of a mouth,
The third movement floats down in parallels—a scratch, then soft overtures:
As you push the metal forehead back into its place.
Discover the contents and indulge | As you did your inverted concerto
Answer: The sound from opening a metal can (e.g. soda can, tin can)