  An experiment performed in 2002 by Sciarrino et al. provided a simple proof
of the nonlocality of a single photon whose wave function is multi-branched.
The difference between this experiment and others similar, is that the
tester-particle used by Sciarrino to "feel" this nonlocality is another photon
identical to the tested one. Such an experiment be can in principle performed
with fermions too, and this is the case ivestigated in this article. The novel
phenomenon revealed by Sciarrino's experiment, is the particle "borrowing". If
a single particle is described by a two-branched wave function, then only one
of these branches produces a detection at a time, the other ranch remains
"silent". What happens in this experiment is that the silent branch "borrows" a
particle from another source, if available in the neighborhood, and also
produces a detection. To illustrate this feature more obviously, a modificaton
of Sciarrino's experiment is proposed. Two sources of particles are made
available in the neighborhood of the two branches. What then happens is that
each branch takes and populates itself with a particle from whichever source is
at hand.
