Well, I once posted the weather for an indoor game in Tampa. I think i said something about the possibility of thunder showers and another poster commented on what a trick that would be for thunder showers to form indoors like that. It was a very 'Duh!' moment.
Brian, I'm afraid, does not grasp the subtle difference between the two, but there is a difference. It's difficult to explain but rather something you just know instinctively and not everyone has that ish/ick instinct.