Think the cases of Russian spontaneous combustion are also a case of too many potatoes, though in a distilled form? Nah, most of the Russian vodka is cheap crap, the product of column or continuous distillation of grain or even cheaper sugar sources. On the other hand there are some great Polish potato vodkas and they're not spontaneously combusting from it. Maybe it's just an Irish thing.
My best advice.... If you start to spontaneously combust, douse yourself with Guinness. On second thought, probably too late after you wait for the perfect pour. Maybe there's a good purpose for the quick pour or the widget cans?