Awesome thread idea!
I'm struggling to think what mine was.
I do remember seeing
Jurrasic Park 2 and
Mousehunt at my local cinema at the age of 7. The cinema has since been turned into a church but from what I remember it was huge and made me think of a threatre up in the westend. Of course, I had hardly been to the west end at that age. And this local cinema was in....woolwich. Funny how amazing things seem as a kid.
I'm sure there's other films beforehand though.