Can you please tell me the exact name of the movie and when these lines come up in the timeline appr.? Thanks.
I'll see if I can find the script, and even like that, I can't assure you the script is absolutely right. (Or do you have the subtitle? My computer can't run subs. )
Seriously, it doesn't matter at all what is after the "burst in", not at all. "In" is only related to "burst" here as its adverb. It is true that the very first sentence is not clearly said, I'm not sure about the "as", perhaps "with stories of...", they always invent weird accents to pretend to be Greeks and Romans, besides, be fit to doing doesn't sound that bad to people's ears, that's why they believe it's a gerund.
God I don't understand you I'm trying to patch up your theory but you're just trying hard to prove it's a slip. If it was a misspeak why didn't the filmmakers just shoot it again? Just a close up for 2 sec. too obvious to be a goof.