My bed makes popping sounds
i have a double bed which i think is box spring.
it seems to sag a bit in the middle and make a little twang sound. currently I'm sleeping on the bottom side, not on the side people usually sleep on because its stained by makeup, tea stains etc.
this bed i have lasted since 2012 now i can tell it's already starting to wear off a bit. i used to have an old, old matress that would have the springs pop out and stab me. now this mattress is starting to make a Pop sound, then i find myself moving along the bed trying to make the springs pop just to feel satisfied.
and no I'm not trying to get stabbed if that's what your thinking.