what effect is this?!

[lestera34]

I've heard this on a few recordings previously, but didn't pay too much attention to it until I heard this song - what is the pedal being used by EG here?

http://www.youtube.com/watch?v=Gz7hC6oMb7U

 

[GCDEF]

That's his playing recorded and played backwards. There are pedals that can kind of simulate it but I couldn't tell you what they're called.