Too large fatty meals make excessive demands on the upper section of the digestive system There is just not enough capacity and not enough digestive juice from the pancreas to break food down into its individual components. The consequence: previously undigested nutrients reach the large intestine to be broken down by the bacteria of the colon flora which, in turn, produce large quantities of gas.
The same phenomenon happens if food is eaten which contains indigestible constituents for people - e.g. legumes, varieties of cabbage and onions.
Gases are introduced directly by fizzy beverages and whipped food. Not to forget the air we swallow while eating, drinking and even talking. The danger is especially great in stress situations.