It must be an absolute nightmare to make a film like Avengers: Age of Ultron. You've a cast of a dozen A-list celebrity egos to manage, a horde of rabid fanboys to please and an increasing sense of "superhero movie fatigue" kicking in.
Keeping up the excitement necessitates cloak-and-dagger secrecy from the film makers, who went to extreme lengths to keep plot details from leaking onto the net. Every day, cast members were required to burn their copy of the script before leaving the set, to be replaced with a brand new one the next day.
"It was quite funny that we had to burn our sides for the day," revealed Elizabeth Olsen, who plays Scarlet Witch in the film.
"We weren't allowed to go home with our little pages of whatever we shot that day.
"They took it from our trailers and shredded it. It's pretty crazy [...] Everything with Marvel is very lock and key and hush hush, you gotta sign a confidentiality agreement."
Avengers: Age of Ultron hits UK cinemas today (April 23rd). We've seen it, and it's pretty darn good. Head back later this week for a spoiler free analysis, but for now, feast your eyes on this superb all-LEGO trailer. [BBC]