Stomach rumble

Whenever your stomach is hungry (usually hungry) or upset.

When the contents inside of your stomach move around it enforces a stomach rumble or two,
Chris: Man, my stomach keeps rumbling! I'm so hungry!
Or
Chris: Man I ate too much pizza, my stomach keeps rumbling!

Puke

Usually whenever you are sick, when you overindulge, and/or see/hear something disgusting.

Amy: I have such a bad stomach bug, i've puked at least 5 times.
Or
Amy: My god I ate too much pizza. I dont feel too good (lol)
Or
Amy: I just puked because I heard Mark talking about what he thinks bed is like.