Leeds away in the FA cup in the seventies. We won 2-0 (or was it 2-1?), but the Leeds fans invaded the pitch and things looked a bit ugly for a while. I seem to remember two City players (think Tueart was one) coming over and gesturing to stay off the pitch. I thought that was a bizarre thing to do at the time, because I was only a youngster and couldn't imagine why anyone would want to.