10 movie scenes you didn't know were completely improvised

You might associate improvisation with avant-garde indie films or students wearing bright T-shirts, but as this new video from Screen Rant proves even the biggest of blockbuster movies can find space for a little freestyling from its cast.

Whether it’s the odd extra line in Avengers: Age of Ultron and Independence Day or a full-blown CGI beatboxing session in Teenage Mutant Ninja Turtles, improv can add a lot of fun and levity to films – just so long as the actors remember to return to the script afterwards…