Can your body explode during scuba diving?

Answer 1

No. The closest equivalent thing that can happen is that if you hold your breath and ascend, the expanding air in your lungs will cause a lung expansion injury. The most serious of these are arterial gas embolism (when air is forced into the bloodstream) or pneumothorax (when the lung wall ruptures).

The amount of internal pressure taken to make a human body explode could only be created by pressuring the lungs and then inserting the person directly into a vaccum (for example, by ejecting them from a spacecraft).