I couldn’t wait for my friends to discover that I had a major part in a new sci-fi movie with co-stars Katie Price and Madonna.

Set in a theme park, the plot revolved around a mysterious invisible killer that lurked in the corners of ride machinery. When I witnessed Katie Price character’s death half way through filming, I wondered whether my own would make it to the end. So long as I avoided the areas where the enemy lurked, it looked like I would survive the nasty fate of full-body petrification.

Then the director called for me to mount the open mechanical lift to travel to the top of the rollercoaster. At the bottom, I had a brief chat with a young lad with bad teeth, who was sitting in the cab with a toddler and a new born. He explained that he combined his driver role with babysitting for the production team. When I climbed into the yellow metal cage as instructed, the lad took charge of the lift controls to jerk me upwards.

This was it then: I was to be flung from the highest point of the rollercoaster to my death. Still, as a mere extra I had done well to last this long into the story.