How to Eat a Sandwich

I hate when you eat a saucy sandwich and when you take a bite the whole sandwich kind of like slides out. And then I'm eating just bread. That's why sometimes I'll put like my hand on the back of a sandwich when I eat it. Just to make sure it doesn't fly out the back. Not all the time. If it's like one of those like super wet burgers or sandwiches, I'll put my hand behind it like this. And I'll bite it like that. Just to stop the slide. But what if it's like a longer sandwich? I know what you're trying to do. First of all, how long of a sandwich you think