Squeaking Bed Springs

The people in the room above me have beds with very squeaky springs, so that any sort of movement on the beds is clearly audible in this room. Almost every day since, oh, August, there has been some sort of rhythmic spring squeaking from above. I wonder what those sounds could indicate? And just a few minutes ago, there were squeaks and groans at very frequent intervals. All I could think to say was, "Get it!" Hey, if some people have cause to celebrate, more power to them. Sweet succotash, it's on again!