YES. And it's very dangerous when it does. Nobody wants a flying hot pot bouncing inside their kitchen. It isn't as harmful as a weapon, but it can spray everything around it with aluminum fragments, boiling water, and scorching hot coffee grounds. It's messy, dangerous, and dirty  Fortunately, avoiding such an accident isn't too difficult: - Use coffee with a medium-fine grind size. If coffee is too fine it can clog the filter. The Moka pot's valve releases some pressure, but sometimes it isn't enough - Never tamp the coffee. Proper tamping is crucial for espresso, but a Moka pot can't deal with a compact coffee cake. If coffee is finely ground and tamped inside, then the Moka pot is very likely to explode. - Clean your Moka pot properly and periodically. Below I will describe how, step-by-step.