Important note for Charles Oliveira ... or any other professional athlete for that matter:
If you suffer any injuries to the thoracic cavity in training, GO SEE A DOCTOR. Immediately. And whatever you do, don't ever compete in a mixed martial arts (MMA) match without medical clearance.
Oliveira suffered what was originally diagnosed a "torn esophagus" little more than 90 seconds into his main event bout against Max Holloway at UFC Fight Night 74, which took place last Sunday night (Aug. 23, 2015), and was eventually removed from the Octagon on a stretcher.