While cooking some spaghetti for dinner today I added some salt to the noodles and oil and got some pretty intense crackling going on due to the millions of tiny tiny bubbles.
I had my recorder in arms reach, so I parked it up close and recorded a few minutes. When I brought it in to catalogue I started varispeeding the sound, and realized just how much it sounds exactly like pure unmoving tv or radio static, even at very slow pitches:
That's pretty useful! Bring on the lo-fi.