As we all know, plenty of shocking movies still clean up at the box office because of the branding that comes with them (Matrix, Bad Boys, Jet Li; we’re looking at you), but The Butterfly Effect came with no such recognition.

“Electromagnetic radiation causes increased risk of disease by causing DNA strand breaks,” says Dr Michael Wald, a director at US-based Integrated Medicine & Nutrition, “that’s what causes cancer.”

Like anything else, you get used to it. Embarrassingly I was in Calabar in the southeast of Nigeria making Half a Yellow Sun. I was travelling back to America and putting my bags on the counter and the airport lady asked my name. I said ‘Chiwetel Ejiofor… c-h-i’.