Okay, first off, when was this? If it was only a few hours ago, you still have a chance. But you must be quick. First, check your medicine cabinet for a bottle marked "hydrogen peroxide." If you can't find it, grab a bottle at your local drug store. Next: drink about 5 swigs. This will help to separate the gum from the walls of your stomach. Now, find the nearest vacuum cleaner or leaf blower in your house. Once you find it, set it to "blow" and insert the tube into your rectum. Turn the vacuum/blower on. This operation is called the dancing swan maneuver, and it is made to completely void your digestive tract of all materials. This should force all stomach and intestinal contents out of your mouth. Do this continuously for approximately 2-3 minutes. The gum should be out.