[–] Thisismyvoatusername 0 points 9 points 9 points (+9|-0) ago
A forwards funnel is simply a funnel, where whatever is moving through it goes into a smaller and smaller space. To describe the opposite of a funnel he used the term backwards funnel where the objects spread farther and farther apart. I actually don’t think what he said was stupid. To someone who knows nothing about shotguns (explicitly the audience at whom the statement was aimed) that is any easy description to get the point across.