#1
It sounds like some kind of feedback combined with a whammy bar for most of it.

Any ideas how I could duplicate it the sound?

Cheers.
The best guitar lesson site: http://www.justinguitar.com/

Ibanez RG565
Fender Japan Telecaster TC72-78
Korg Ax1500G
Ibanez Weeping Demon Wah
Boss MD-2
Boss DD-6