Violent life hides within flour and water...

Day two in the life of my sourdough starter.. Is supposed to be relatively uneventful. Life isn't supposed to take form for another 2 days at least. However.. I woke up this morning to find my little jar of starter had somehow TRIPLED in volume. My apartment is either clogged with microbes or my No Name flour was loaded full of wild yeasts. I'm slightly scared of the violent life hiding within a peanut butter jar on my counter. Well.. one more day just to be safe. Dumped out half the starter, fed it another half cup of flour and a half cup of water.. And it's time to wait to see what will happen..