Which effect Frusciante uses for this?

[bouncy]

Would be good if anyone has any clue on the effect that John uses for the bridge of this version of Can't Stop at 3:41.

http://youtube.com/watch?v=cQ50x_b2H2A

My best guess that its a modulation or a filter.

 

[LooseCoins]

if im not wrong,it should be a phaser. and if u happen to be looking for one pm me! got one to let go. haha.