what effect does munky or head use in the beginning riff of freak on a leash???

if i am using a 50 watt marshall..sorry i can't remember which model..how can i get that other than using vibrato with my finger??

if you can't tell me that..pleas just give me a hand on what effect he uses.

thanking any help in advance.
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Dude... I want to date a drum major. I bet they could fuck in time to Tool.
flanger or chorus, it's sorta hard to tell; you can get that organ sound with both pedals.
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dude calebrocker, that first song on your list almost made me cry
you win my good sir

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