There is a mix of things in the image that makes my penis like diamond . First scenario: the artist makes it clear that X waifu will/may explode, the waifu says so, stretch mark appears, the manometrer is near red, the air compressor or air tank is out of reach, some sharp object near her, or some object squeezing the waifu (belts, some bondage clothing or the place where she is inflating is getting too small) Second scenario: accompanied, I can't say much about this one. Is a scenario poorly exploited by many performers, but many erotic scenarios can be pulled out. Third scenario: Public inflation, the only fun of this scenario is simply a waifu being inflated until she explodes while people just watch. something simple, but effective. And finally I like the safe popping where the waifu appears naked after the explosion or if not safe it should be confetti style. nothing gore.