Mingus's "Trippy Drum Shadow" technique.
Create/import drum loop. Duplicate it onto another track.
Keep the original the same, let's work with the duplicate.
Reverb the hell out of it and cut out all the low end so it's just the higher frequency reflections that are heard. Now EQ to taste (you may want to bump the frequency of the snare, mabye the hi-hat...)
Play both the original and the "shadow track" together and EQ and level to taste.
Now get a side gate (midi or audio). I like Scuzzphut6 the best
Hybridalien:
http://www.hybridalien.com
Scuzzphut6
http://www.djmarko.pwp.blueyonder.co.uk/
With the side gate, enter a rhythm that is complimentary to that of the original loop and make sure that it highlights the parts of the "shadow" track that you like...
Now, you should be left with a real tinny (or muddy depending on which way you went) very "washy" but rhythmic track that has lots of verb, but is "chopped" up into a synopated rhythm. You'll want to tuck this to about 1/4 as loud as the original loop.
Now the "trippy" part....Let's say the loop was four bars long...Use the time stretch function (I use Cubase, but I'm sure all sequencers have a similar function) and drag the loop out the 8 measures (or double of whatever your loop is).
The end result is a real washy, on TEMPO but not quite on BEAT "Ghost" track that "shadows" the original and adds texture and depth.
Add chorus, Flanger, or a stereo panner for even wierder effects.
If you'd like I'll toss up some examples, but I can't really do a "step by step" as there's a gazillion different ways to approach this.
Cheers