Rock in a Box

Rock in a Box is object encountered by Tommy on the Sphere during the events of Prey.

Overview
During the level Downward Spiral, Tommy comes across a strange box with rock in it and a portal that leads into the box. Ones on the rock, Tommy finds himself miniaturized as anyone else that enters it too. The rock has it's own gravity and functions as a mini-planet of sorts. The rock also had lights mounted on it. It's unknown what purpose to the Sphere, this rock served.