It gets louder and you start to panic. Is it an earthquake? Are you about to be buried alive with thousands of poker players and railbirds, your final words being "That Hollywood Dave sure is a do...."
No, don't worry. There's a simple explanation. You're just hungry.
So, head over to the Poker Kitchen for a bite to eat. There's plenty of options available to quell that inner growl. We've put together the PokerListings quick guide to the best and worst of the delicacies on offer.
Poker players love pizza and you can pick up a small pepperoni or margarita for just $7.
PROS: A quick hit of cheese and grease can help soak up those seventeen beers from last night.
CONS: Not too healthy, limited varieties of pizza which are kept warm rather than freshly made, meaning they can dry out. Pull your socks up fellas!
SPORTS DELI EXPRESS
Burgers and hot dogs - classic American food.
PROS: Pretty popular, the food may not be haute cuisine but the Sports Deli haven't dropped the ball here. Standard, but competent fast food.
CONS: If you have a prop bet with Phil Laak to drop 20 pounds at the series, steer clear!
You like it hot, you like it spicy, you like it Mexican! Arriba! Expect Burritos, tacos, quesadillas. The usual suspects are all lined up to line your stomach.
PROS: Who doesn't like Mexican food? It's all there and it's pretty good. Probably slightly healthier than burgers and pizzas too. Get stuck in!
CONS: A bit messy to eat sometimes. You may find you walk back into the amazon after a couple of tacos with tomato sauce and cheese stains on your shirt. And then people will laugh.
Chinese food provides that shot of MSG in a sweet and sour sauce.
PROS: There's some vegetables in the food. Pretty tasty on the whole.
CONS: Not the best chinese in the world.
Being in the desert it can seem strange to be eating raw fish, but Vegas is proud of its range of sushi. How does the Rio sushi rate?
PROS: It's rice and fish. Your doctor will be most impressed and Phil Laak will start sweating on that prop bet if you keep eating this. Definitely the healthy option.
CONS: Dry, pretty tasteless. Not great. Plus you may be sick of fish by the time you've been stacked for the fifth time in the kippery Rio cash games.
The famous chain like to boast they are the official sandwich-makers of the series. Do they live up to the hype?
PROS: Decent range of sandwiches. The Bobbie - a turkey, cranberry and stuffing combo - is a big favourite with the players. These bad boys are BIG as well. You won't need two of them.
CONS: A little overpriced.
So it looks like it's a tie between Capriotti sandwiches and Bambolo Express. But what do we know? Head down to the poker kitchen and try things out for yourself.
See you in the queue!