Just thinking of the gravitational effect of that mass, the field strength is (GM/(R*R)), which is 6.7*10^11 * 10^12/(R*R), or 67/(R*R). So at 1 metre distance, it's 6.7g. This would, presumably, be drawing in some mass from the atmosphere as it falls, with much of that converting to X rays as it approaches the (tiny) event horizon. Though it's moving at 140 miles per second, which means it'll pass before most things have a chance to react. If it got to your body, it would, I suppose, drill a precise tiny hole through you (since the Schwarzschild radius for such a small black hole will be tiny -
according to this, 1.4*10-15 metres) and your atoms would experience a sudden jerk of acceleration toward the drilled cylinder, that lasts an incredibly short time.
I guess that means it might do
more damage if it were slower.
After that, I guess it might get slowed down by having to go through the much greater mass of the Earth. Still, it starts at well above escape velocity (but within a couple of orders of magnitude of it), so perhaps it'd make it to the other side. Would you get a lot of heat energy, but spread out over a few thousand km in a line, and so not that disruptive?