“Class of ’88 reunion,” announces Sonic Boom. He has just played “Transparent Radiation” and is about to launch – launch may not be the right word, exactly; slope, perhaps? – into an excellent “When Tomorrow Hits”. In front of me, someone is wearing a “Goo” t-shirt. On the way to the Roundhouse, someone randomly proffered an open bottle of amyl. Only Sonic Boom’s haircut appears to have changed, slightly, in the intervening 20 years.