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Hi, what you hear are copies of the original phrase in different pitches.

To make the effect more 'loose' you can just record the phrase a couple of times. One whispering, one talking, one screaming. And combine them in different pitches (keeping the original speed).

Good luck.
 
seems to be a bit more than just pitch shifts, doing that with my own voice hasnt led to the desired effect. heres what ive tried

Drop pitch by 15%, (i.e. -15%),
Bassboost 150Hz by 10db
Delay: delay time 0.05 sec, 5 echoes, 5db decay amount .

but i think its got some vocoding, high pass filtered noise, and some reverb in there(maybe reverse reverb?)

unsure the settings to achieve the desired effect though
 
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