  "Orion fingers" are a system of dozens of bowshocks, with the wings of shocks
pointing to a common system of origin, which is centered on a dynamically
disintegrating system of several massive stars. The shock heads propagate with
velocities of up to 300-400 km/s, but the formation and physical properties of
the "bullets" leading the shocks are not known. Here we summarize two possible
scenarios for the formation of the "bullets" and the resulting bowshocks
("fingers"). In the first scenario, bullets are self-gravitating, Jupiter-mass
objects which were formed rapidly and then ejected during the strong dynamical
interactions of massive stars and their disks. This scenario naturally explains
the similar timescales for the outflow of bullets and for the dynamical
interaction of the massive stars, but has some difficulty explaining the
observed high velocities of the bullets. In the second scenario, bullets are
formed via hydrodynamic instabilities in a massive, infrared-driven wind,
naturally explaining the high velocities and the morphology of outflow, but the
bullets are not required to be self-gravitating. The processes that created the
Orion fingers are likely not unique to this particular star-forming region and
may result in free-floating, high-velocity, core-less planets.
