The bit about 5.1 sound is absolute rubbish. You can download the videos online for free and get the EMI-remastered Ummagumma set (which comes with a nifty poster and green cardboard slipcase) instead.

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what do you teach your children about me?
what do you teach your little children about me?
pimp, thug, bling drug lord of the undergrounded kings
how can you be so sure i won't call down the rain?
what do you teach your little children about me?
you point your gun, wait, hide and run. i see it plain