Some people want their proposal to be a full-scale production, complete with skywriting, a string quartet playing Adele, and a flash mob. Others prefer the simple, private, and heartfelt approach. Everyone, however, can agree on one thing: They just want it all to go smoothly. Unfortunately, sometimes the universe steps in and screws up everything. Rings are lost. Rain clouds form. Lovers become stricken with food poisoning and can barely get on one knee to face the toilet, let alone propose marriage. In short, visions of the perfect romantic moment don’t always go as planned. But, hey, if nothing else, at least a mishap can make for a great story.…