[Predictions] What is being said in this OST?

[WhistleBlower]

I've loved this soundtrack since ages and always sing along but on a serious note. Is it just instruments making the sound of this OST or is are people really going :

" OOAAAA HAA HAAA OOHAAA HHAA HAH AAHAHAH AHA HAAAHAAAHA " XD

<span style="font-family: garamond"><font size="4"><strong>[video=youtube;VnDpvzimXE0]http://www.youtube.com/watch?v=VnDpvzimXE0#at=100[/video]

Tell me you love this OST as well?? ​

 

[ObitoGokuKakashi]

People are really singing Oahh Haaa Oahh Haaa .. Lolz

 

[BestFriendsForever]

I like it. But it really seems like people are singing! XD

 

[-ahhimane-]

XD XD XD
Just reading the quoted text