the middle of your salad, tomato, egg and mayonnaise sandwich

That's when the difficulty begins. Because the top of the sandwich does not cover the bottom of the sandwich anymore, and you know that whichever way you bite into it, it will cause something to subside, drip or drop. You can also sense all these eyes looking at you. Which just adds to your distress and embarrassment. So eating your sandwich becomes a sequel of problems to solve. If I bite here, I'll manage to tame the mayonnaise but there's a chance that the egg will drop out and that the bottom and the top of my sandwich slide even further apart. In reality, what happens is that part of the egg gets stuck to your upper lip, most of the mayonnaise drops onto your jeans, the tomato shoots out and drops to the floor and a large leaf of sorry salad is still hanging limply from the rest of the sandwich which you would still like to finish.