How To Win A Burping Competition

You have down the monopoly, droughts has lost its attraction and there are only so many games of connect 4 that you can play so the natural progression is to have a burping competition, although that may just be my son and husband.
As with most things, there is a science behind the art of the perfect belch so i cheated and asked a real life scientist what is the best thing to induce a real, winning belch.
First the sceince bit, swallowing air is the most common cause of burping, this excess gas will always find an exit route somewhere downwards or upwards and as generations of small babies have discovered, some gentle manipulation  of the stomach and a back rub helps maneuver the wind in the right direction.
Using a scoring scale of peak for volume, earthiness and length of emission, the usualy weapon of choice is drinking lots of fizzy drinks through a straw and if you giving it a teeny weenie hole halfway up, the mix of the extra oxygen and carbon dioxide can be a winner but the gas gets released quickly and the winning stategy is to hold down several separate belches and then stringing them together in one long satisfying release.
Eating sherbert and sucking lustilyon fizzy sweets is another good policy as they also contain carbon dioxide and continue to expel gas all the way down to the stomach producing a violent time bomb just waiting to happen but again short lived.
The scientific advice, if you are holding a burping competition is to go for the long game and eat a big meal very quickly, the action of the air being forced down your esophagus and pushed into the stomach and is sat on by the dinner you've just shoveled on top when the food shifts to one side the wind passes up again and the resulting velocity, volume and earthiness is unbeatable as the resulting belch erupts between the stomach and the esophagus whereas in the other methods, it occurs higher up in the esophagus.
So if you find yourself at home with teenage relatives who thinks a burping competition will be fun, stuff your face really fast and earn the respect of your younger relatives.