Actually, to make the thing more interesting why don't you make the sandwich as spicy as possible?? For normal sandwich, the competitor just keep eating without any expression except TOO FULL. I believe, most of the audiences wanna see how the competitor resist the spiciness and provide the carbonates drink to competitor and mineral drink to competitor. Competitor only allow to drink carbonates drink in order to CONTINUE to match and drink mineral water if feel GIVING UP or SURRENDER by themselves. Beside than eating, it also test the competitor temptation as well.