Einstein’s 1905 paper on special relativity (The laws of physics are valid for all bodies in uniform motion) can’t explain this because those pins are accelerating. It takes Einstein’s 1916 paper on general relativity to discount that acceleration and still affirm that the laws of physics apply.
In humanistic terms:
If you can’t be,
with the one you trust,
trust the one you’re with.
(Crosby, Stills and Nash)
That is especially true if you drop a pin
and follow the natural instinct
to bend down and pick it up.