Greg,

Yeh look out Jagger!

I ran 2 versions of the drums with one eq'd to enhance the snare and then delayed one a few milliseconds to get a mini phase effect, I did it by ear rather than using science.
The snare hit, up to 45 seconds, was a combo of 3 hits I cut from the realdrums and the end of the hits faded to eliminate as much as possible of the next sound without loosing a reverb tail.I used 3 because of the different velocities/sound of some of the snare hits and used all three with 2 moved milliseconds, one forward one back. Then compressed the drum bus and a little reverb as if in a small-ish live room. It took a while and I am glad you liked the effect!