Just reading Aldo's story on the Official Site and thinking some more about it. It was the noise, or rather lack of noise, that made it clear that it wasn't a pitch invasion caused by hooligans (which was everyone's immediate natural reaction - everyone who wasn't in Leppings Lane, I mean). I'd been in and around grounds when it had all kicked off and it was invariably accompanied by lots of shouting and screaming (mainly posturing). At Hillsborough, my memory tells me it was really quiet. No idea if it was or not, but that's how I remeber it. Aldo mentions it and it jogged a buried memory.