Cooking Level:. College My roommate took our microwave when he moved out. I improvised to say the least... NOOOO! WHAT ARE YOU DOING?!? YOU'RE NOT SUPPOSED TO HEAT LEFTOVER PIZZA!! Cooking Level: College My roommate took our microwave when he moved out I improvised to say the least NOOOO! WHAT ARE YOU DOING?!? YOU'RE NOT SUPPOSED TO HEAT LEFTOVER PIZZA!!