From the brains behind brains on, this is the moment of um.

Moment of um comes to you from APM studios. I'm Barry and I'm a speck of black pepper.

Um.

I have the best job in the entire world, seasoning your food.

My buddies and I live inside a pepper shaker on your kitchen table, waiting for the day that you decide to sprinkle us on a delicious meal.

Lots of nights, when the rest of my pepper buds are snoozing,

I lay awake and imagine what kind of food I'll get to season someday.

Spicy kimchi ramen?

Scrambled eggs?

Caesar salad?

The possibilities are endless. But sometimes I get a little impatient. Like I can hear your

tummy rumbling from across the room and I think, come on, just grab a meal and sprinkle me on it.

I know you're hungry. I mean, I think a rumbly tummy means you're hungry, right? Huh,

why does it do that anyway? Rosemary was just asking about this. Hi, my name is Rosemary,

and I'm from Dallas, Texas. My question is, why does your stomach rumble when you're hungry?

Music Texas. My question is, why does your stomach rumble when you're hungry? Hi, I'm Lily Dara. I am a gastroenterologist and an assistant professor of medicine at the University of

Southern California in Los Angeles. Gastroenterologist is a doctor that treats people who have a stomach and bowel and liver and pancreas

disorders. So basically if you have a tummy ache or if you have diarrhea or liver disease,

then you'd come to a gastroenterologist. So to start off, you have to understand what the

GI system, the stomach and the intestines do. Basically, their job is to get all the good stuff out

of food, what we call nutrients, so that we can grow stronger and we can remain healthy. In order to do

that, once you eat the food,

...