I decided to try out the new spiral vase mode in Slic3r. What this does is print an object in a continuous extrusion, rather than the normal stop, raise to next layer, then continue like usual. The idea is to create a seamless print that is in theory water-tight. Something glitched on my printer part way through… I’m not sure what happened. The end result is that the glitch slowly worked its way around the vase as it printed....

It is well established that all micro electronics work by containing an active loop of magic smoke. As long as the magic smoke is contained within the circuit everything works well. However, many things can conspire to break this wonderful system. You will know when this happens, because you will observe the magic smoke leaking out of your device. In all seriousness, a bad crimp on a heavy gauge wire going to the heated bed platform...