Sometimes, authors have little quirks and things they don’t even realize they’re overusing. “And then” is something I particularly notice when it’s used a lot because it always puts me in mind of this scene from Dude, Where’s My Car (I am a huge fan of really stupid comedies and this one has some very quotable lines. Dude, what’s mine say? Sweet! What’s mine say? Dude! What’s mine say?).
Make sure you watch all the way to the end of the scene, to really see how your editor (okay, maybe it’s just this editor since I know the movie!) feels about “and then”. No “and then”!