A food safety article really stressed how important burping is for ferments. It said yeast and bacteria make carbon dioxide that needs to get out. Now I'm extra careful with my own projects after hearing these horror stories!
Oh wow. I always figured the burping warnings were overkill for something like hot sauce. My own half-fermented jar of jalapenos sat for a week without a check and now I'm rethinking my whole lazy approach. That visual really drives the point home.