two contenders for the "when i was a yout" source:



now that one has the melody alright, but this one has "the when i was a yout i used to bun collie weed in a rizzla" bit (coming in quite late in the song, around the 3 minute 10 second mark)



cheers to john eden, ed torpey and craig allen for droppin knowledge

as for the jungalistic hardcore tune that sampled it, various contenders here --
Nu-Matic's "Hard Times", Prodigy's "Fire", A-Sides's "Burn Cali Weed", but I think this one, Order 2 Move, "Rizla Bass" on the Boogie Beat label is the one I'm thinking of, although in my memory it's more skanky 'n' rootical and less rushy (perhaps a different, later remix?)