The capsule will be manipulated in the esophagus and stomach with both flexible endoscopic and real time capsule imaging. Once manipulations in the esophagus have been completed the volunteer will be elevated (tilt table, sit or stand) to see if the magnet can hold the capsule in the esophagus against gravity. The capsule will then be allowed to pass into the stomach where it will be magnetically manipulated. Once the examination is completed the capsule will be removed using a Roth snare, a standardly employed accessory with a net which can be closed over objects for retrieval and is commonly used for polyp retrieval.