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strike by rapidly unfolding and swinging their raptorial claws at the prey,
and are capable of inflicting serious damage on victims significantly
greater in size than themselves. In smashers, these two weapons are employed
with blinding quickness, with an acceleration of 10,400 g (102,000 m/s2 or
335,000 ft/s2) and speeds of 23 m/s from a standing start, about the
acceleration of a .22 calibre bullet. Because they strike so rapidly, they
generate cavitation bubbles between the appendage and the striking surface.
The collapse of these cavitation bubbles produces measurable forces on their
prey in addition to the instantaneous forces of 1,500 newtons that are
caused by the impact of the appendage against the striking surface, which
means that the prey is hit twice by a single strike; first by the claw and
then by the collapsing cavitation bubbles that immediately follow. Even if
the initial strike misses the prey, the resulting shock wave can be enough
to kill or stun the prey.