  We investigate the role of massive perturbers, such as giant molecular clouds
or stellar clusters, in supplying low-angular momentum stars that pass very
close to the central massive black hole (MBH) or fall into it. We show that
massive pe rturbers can play an important role in supplying both binaries and
single stars to the vicinity of the MBH. We discuss possible implications for
the ejection of high velocity stars; for the capture of stars on tight orbits
around the MBH; for the emission of gravitational waves from low-eccentricity
inspiraling stars; and for the origin of the young main sequence B stars
observed very near the Gal actic MBH. Massive perturbers may also enhance the
the growth rate of MBHs, and may accelerate the dynamical orbital decay of
coalescing binary MBHs.
