If you have a grill that is several years old, some of your burners may be rusted and deteriorating, causing these large, out-of-control flames. It's definitely not safe to us in this condition. Remove the cooking grids and all parts above the burners and examine each burner with a flash light. It's also possible the seams have split which may be harder to tell that it's defective. If you can remove each individual burner to inspect it, do it and and make sure there are no restrictions inside the burner, like bug nests, debris, etc that could clog it and force gas out the venturi tube at the orifice. If you had moved or transported the grill recently before using it this last time, it may have jostled something loose or caused the rusted burners to fall apart so quickly. Hope this helps. Let me know if you need more assistance. Douglas