I just finished working out, so I am drenched in sweat! My abs glistening on the outside, but sloshing waves of water on the inside. It's like I have a gallon of sweat trapped inside! While I dance my belly you easily hear the waves of water move from within. I'm almost certain this is the loudest my belly has ever been! I suck in my belly then push it out with and it sounds like a washing machine in full cycle mode! Gurgling and growling is also among the sounds from within. Enjoy what a fit, sweaty tummy can sound like, from within!