I always wanted to go on that, but from Wales it was difficult to get there as a young pup. Luckily for me Swansea had it's own 'Alien Experience'.
One man with a Giger Alien head and black jump suit - check.
One egg with facehugger on string - check.
One 'marine' with a revolver cap gun - check.
Lots of dry ice, James Horner music and strobe lighting - check.
Was a ball, but no where near as cool looking at the TV ad for the Trocadero, or was it on the Aliens Special Edition Video? I saw it somewhere.