Hot Chili Peppers
Capsaicin, a substance found in chili peppers, is mainly responsible for its intense heat and spiciness. However, these compounds vaporize when you microwave these peppers because of the extremely high temperatures. Fortunately, they won't blow up as a result of this.
However, as you can already imagine, this means that the steam that these peppers produce will be quite strong. When peppers are microwaved, whether to soften them, dry them out, or reheat a hot sauce, the capsaicin, which gives peppers their heat, becomes airborne. Then, by just opening the microwave door, any unsuspecting home cooks could end up pepper-spraying themselves. Due to how hot it is, it can burn your throat and eyes. You may find yourself in some serious pain as soon as you open the door and breathe in the fiery fumes.