The Semi-Colonoscopy

Fletcher U. Lent was just a normal scowl-faced dude, that is until he stumbled upon a shrink ray after wandering off during a Nuclear Engineering lab session! As if his day couldn?t have gotten any worse, now some fool up and ate his shrunken self (for not-at-all-convoluted reasons)! Can you use his latent rectal thrust ability to escape the belly of the obese? Or will the waste-ridden walls trap you in those fulsome bowels, your intestinal journey doomed to be forever known as The Semi-Colonoscopy?!?