Temper in the egg?

You whisk an egg into the hot liquid you are using slowly so that you do scramble the egg.

you must penetrate the nucleus and extract its DNA

It refers to tapping gently on the outside of a fertilised egg for as long as possible. Eventually the chick inside will become so distressed (temper) that it will come out of the egg earlier than...

It means to add a small amount of the already hot liquid to the beaten egg to bring the egg up to a temperature gradually so that it does not become a scrambled egg within your mixture.

Because if it were a ninja, you'd be dead.