No so much of a stretch: Leonard looks quite a bit like Linus, and Linus does dive. A kernel OOPS in a drysuit for lack of preparation, diet discipline or foresight, that, on the other hand is a stretch. Even Laurent Ballesta with his marathon dive in Polynesia did not bring diapers. BTW, what are the specifications of a DIR diaper ?
The truth be told, my wife did have a memorable "ocean handwash event" once, and it was only her 3rd open water dive. She had to drop the tank and BCD, secure the belt, attach all to a lifeline with help from her DM, strip off 5mm onepiece+5mm overvest+polarfleece undergarment (yes, I know) and then wash off all the bits while floating in her swimsuit in a 13 Celsius early spring meditteranean water, before coming closer to the RIB. That was caused by a bout of lactose intolerance combined with a bit of stress and a rough seas... But she handled it like a boss and earned the respect and everlasting jokes from those who witnessed her OW cert outing.