The $1000 bet, looks like a bet to scare you more than a Str8. If i had a str8 with position, I would raise to 600 or 800 max... I would even call this bet and min-raise your river bet or something else to extract more money than to scare you. However, a set could play it like that, a little fast but would make sense to charge you for a AJ or AQ...

I call and loose.