Pop corn in microwave as normal. Pour into bowl or pan and shake down unpopped kernels.
Put popcorn onto cookie sheet until layered out.
Melt chocolate in microwave for 1 minute, stir, and put back into microwave for 15 minute intervals until thin and runny. (Be careful not to burn it.) Spread over popcorn by using a large hypodermic syringe (without the needle) which you can get at a farm supply or veterinarian's office. Or you can pour it on the corn with a spoon in thin streams.
After you put on the chocolate place into freezer for about 5 minutes (10 minutes for white chocolate); then remove, break it apart and put in tins or whatever. This is a real winner!