When they remastered it for 5-channel audio, they went out of their way to hit you from all sides. Time has the bells ringing everywhere.
They did that live when Roger Waters played Glastonbury last year (the Pyramid stage got a quadrophonic sound system). It ruled. There was another one with dogs barking all around, which didn't half confuse a real dog in the audience. Mind you, yet another had a helicopter panned all around the soundstage, at authentic volume, and it didn't half confuse all the people in the audience...

Peter