My earliest vivid memory of Villa Park in the '60s was the home game v Preston circa 1968 when the fans started to revolt - 12000 in the ground, and I can still feel the sound of stamping feet in the old (wooden floor of) the Trinity Road stand.
In those days, as a child going to the game with my dad, I'd never enter the ground through a turnstile, I'd crawl under it - as my dad would slip the turnstile operator the price of a pint of beer, and down on my hands and knees I'd go.