Default stuck "downloading"

ok gents...and ladies, this is for an sgh-t959v galaxy s 4g. My son was trying to flash a rom to his phone and somehow, I have no idea, screwed the pooch and his phone is now stuck in "downloading" mode. the battery was pulled for several days and when the phone is rebooted it goes immediately to the "downloading" screen. any help what so ever would greatly be appreciated. Not: its not stuck in download mode...well sort of, its stuck downloading.