He follows it. It's not because he wants to cause it any more pain or expend any more effort but because he has answers he wants to seek. His right hand lowers enough to let his Dark Matter concentrate around that hand. He wants a light source so he can see it and it is bright and flaring enough to look at his surroundings. He stays in the air as not to step on something disgusting.

Either something or someone is feeding this thing on a weekly basis or it survives purely on luck. He knows spiders don't have to be fed that often so he's looking for signs of wiggling bodies or dead ones just to determine a time frame. He wants to know if someone comes down here to do it and thus if there is an entrance or exit.