The whole thing came through the famous "listen mic" on the SSL console. The SSL had put this massive compressor on it because the whole idea was to hang one mic in the middle of the studio and hear somebody talking on the other side. And it just so happened that we turned it on one day when Phil was playing his drums. And then I had the idea of feeding that back into the console and putting the noise gate on, so when he stopped playing it sucked the big sound of the room into nothing.