I love those sort of tips.
A good one is to put a plastic bottle of water in an open fire. As long as there is no air in the bottle it will heat it up without burning plastic!
Looks like an awful waste of time to me since the technique involved, of course, breaking the egg in two halves; simply "pour" the egg back and forth between the two shell halves over the kitchen sink, or a bowl if you want to retain the whites, until you have only the yolk left in one of the shell halves... takes all of 10 seconds...