ID Request of Rocky

Before anyone worries, the jar has toothpick holes poked in some plastic wrap over the top so Rocky can breath.

Habitat: Found it (I'm going to refer to them as Rocky) skittering across my living room floor, my yard is mostly grass, some Chinese tallow trees, canaba lilies, and is currently damp from some storms.

Time of day: Found Rocky around 10 PM at night.

Geographical Area: Panhandle of the Gulf Coast. Lots of pine in the region.

Behavior: Rocky was running very quickly. They've been mostly grooming their front legs, and reared up a few times at some Dollar General stuff when I took them on a tour. They don't seem to be able to climb up the glass. Otherwise, they've just been staying still, probably out of confusion. Hung upside down when I was transferring them to this jar until I gave the paper a little tap.

If you can give me an ID, that'd be cool, but I'm letting Rocky loose in a nice isopod-rich bush soon, so the photos attached are the best I can get. From what I can see, black body with tawny legs, 1½ cm long and 1½ cm wide (including legs).