One should never keep unhedged short options positions particularly in front of major news such as election, budget,FOMC meet,RBI policy etc.Maharashtra and Haryana elections was a major news expected on this weekend.
I dont think the person who shorted Bank Nifty call is experienced enough to come out of this loosing position with minimum damage. I suggest getting out of the position or atleast reduce the position to half on Monday....I am sure that the market will give another chance to come out with minimum damage or even a profit but that the person wont be able to handle...so come out of the loosing position.
Smart_trade