Eggs

The microwave should never be used to boil whole eggs with their shells on. The high internal pressure that can result from microwaving can be caused by the extremely high temperatures reached. This also goes for microwaving hard-boiled eggs.

Eggs have a notoriety for exploding in a rush of painfully hot steam and causing burns. Unfortunately, even eggs that have not been shelled might generate steam within, making them vulnerable to harm. This indicates that when you break open the egg, boiling hot steam may escape and spill onto your hands or face. Additionally, scrambled eggs or omelets reheated in a microwave would taste pretty darn awful anyway, but after reheating, eggs can become toxic.