QUOTE " Potassium is highly flammable so you have to store it under water!! UNQUOTE That was a comment on Jeremy Vine this lunchtime, when he was discussing the sad story from Wednesday's accident. Clearly the contributor thought that transparent liquids are automatically water. She was describing an accident in a Science lab when the teacher knocked over the bottle and large pieces of potassium were scattered across the bench. WARNING: Potassium is stored under OIL, in case you didn't know.