@ CAD MONKEY
Terminal velocity for a human in a typical arms and feet out pose is ~ 120 mph. In a nose dive a human can exceed 200 mph. Last I checked a pea was a brave bit smaller than a human...
The terminal velocity for a pea sized rock is -
where * stands for multiplication, / stands for division
g is the acceleration of gravity (~980 cm/s^2)
dm is the density of the meteorite (~2.7-3 g/cm^3 for rock)
da is the density of air (~ 0.0012923 g/cm^3)
r is the radius (half the diameter) of the metorite in cm
n is the dynamic viscosity of air near the Earth's surface (~ 0.00018 g/cm/s).
thus the terminal velocity for a 0.3 cm meteorite with a density similar to granite is ~ 1800 mph.
What speed it was actually doing is another matter, but it could have potentially been zipping along ;)