Linalmeemow
Landlord.
I've just started using an aquarium heater and a big bucket to maintain a steady temperature while fermenting. Today I took the FV out to take a gravity read - didn't think to unplug the heater while I did this. I tried to move the heater position when I put the FV back in the bucket and the glass part of the unit cracked, exposing the element to the water. Cue loud crackling and sizzling noises and a stink of burning! Fortunately I didn't have my hands in the water at the time or I'd have been fried...