I would not have called this overbet knowing what your telling me. Although there are so many factors unsaid in this scenario? What is the table image like? Is this player stabbing at pots? Is he a loose cannon? Has been patiently waiting? Regardless, usually when playing low stakes, a large overbet such as this can often be a sign of a beginner player trying to extract a huge pot on a big hand, wanting to make money fast and not understanding pot odds
. Yes, potentially this could be a stonecold heart throbbing bluff, but in my experience with low limit games like this, he probably hit his hand. You should not call in this situation. You will lose in the longterm.