Christian Heilmann tweeted about Dinner etiquette for the advanced users and after reading, I felt it important to offer a text version of the graphic found at the end of the link trail.
Should a guest die during the party, you should, of course, continue in the next room, leaving the deceased at the table, in peace, to be collected later. If he/she hasn’t started a particular course, it is fair to arrange for the
extraportion to be divided up amongst the remainder of the guests. Naturally, if the deceased’s head has fallen on to the dish, it would be bad manners to move the body just to reach the uneaten food (unless, of course, it is a particularly good dish). If there is no alternative room to remove to, then the deceased may be covered up with a suitable cloth or coat, and conversation may be continued. However, although it’s ok to talk over the body, it would be bad manners to talk about the person.
Bon appétit!