I also met Darth Vader (Dave Prowse) in a book shop in Glasgow, when I was a wee boy and he signed my copy of Return of the Jedi, which of course I still have. He looked amazing and terrifying. I'll never forget it.
He also done a road safety campaign here in the UK about 20 years ago, where he dressed in a bright green Jumpsuit - The Green Cross Code Man.
Man that takes me back