one time we had a kit that had extra LME in it. It was first beer we brewed and they claimed there was irish moss in there as well. So long story short, I confused the extra LME with priming sugar and the priming sugar with Irish Moss and then not too much later, boom, bottle bombs. We saved a few bottles and put them in a growler (that my brother released the pressure on every day. Anyway it came out really carbonated. Like worse than Champagne.