system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What actually happens inside us during the ‘stomach drop’ moment?

I’ve been thinking about this a lot ever since I almost dropped a boiling bowl of soup over myself as I was carrying it.

That was definitely the most intense it’s felt but I’m intrigued as to what actually happens inside. It literally felt like my stomach dropped and my heart was racing.
gpt
I think your body shifts the blood away from your stomach into your muscles to prepare you to act to the stressful event you are witnessing. It's the fight or flight response, your nervous system pushes adrenaline into your system and it triggers all of that fun stuff.