threat to life need help

Dear members, need your advice urgently. This evening myself with family was going out in our car. Near a turn, my husband blowed the horn and was about to take the turn when a person on two wheeler came from the opposite direction, turning towards us. My husband put the break.... Did not hit the bike and was atlest four or five steps from the bike. But the two wheeler guy inspite of putting break fell along with his bike. Nothing happened to him. He raised his head and looked at my husband who was then at his side lifting his bike. Once he stood up he started scolding my husband telling that we did not blow horn. But we did blow horn. We left without creating a scene as the guy was working in the same psu where my husband is, we thought of calling him after some time when he would have cooled down and explain the situation. After sometime when my husband called him on his mobile he started scolding and threatened him telling he will harm us. We have a baby. So I am very scared. My husband has the call recorded automatically in his mobile and said he shall try to file an fir with the police. Will that cause any further problems for us? Can the other guy file any police complaint against us. There was no accident exactly. I don't know why he fell. Maybe he lost balance or he was too fast near the turn. Is filing fir a good idea or is there anything else we should do. Kindly advice.