I am absolutely sure they used a Dutch recording for the "Blannesamagawa loomajoobamooga" text. The recording is huzzled and at high speed, but I can clearly hear them say:
"word helemaal gek ... ga een beetje rondlopen ..... helemaal overspannen"
(meaning: getting totally crazy .... walking around a bit ... completele highstrung ....)

And I even think to recognize the voice: either Bart Chabot or Jules Deelder
Hey Dutchies out there on the forum, am I right or am I right?

Sorry I do speak Dutch and I cannot hear that. Funny though