system
Given the following post, respond as if you're commenting on Reddit:
human
Why does fat/oil jump and spit when heated?

I'm talking about when you're frying something like bacon, and the oil comes out of the meat, but then why does it jump around the pan?
gpt
Pure fat or oil doesn't jump when heated. However, in most real world cases there is a combination of fat/oil and water being heated. Since water is denser than oil, it will sink to the bottom. A small pockets of water get trapped under the oil they heat up and eventually turn to steam, or they heat up quickly and flash to steam.

Once you have a pocket of steam under the oil, the pressure ruptures the pocket explosively. In the process, oil is kicked up from the tiny pressure explosion.

So, it is actually water that is sizzling, not the fat/oil. The fat is simply trapping the water.