Avinash Vivian smashed down Rajat on groumd  Bigg Boss 18

Time God Task started between Vivian and Karan Similar task to Bigg Boss 13 was given in which Vivian and Karan as contenders will try to make their clay statue on a wooden box each. Other contestanta will try to destroy, save and support their contenders. So, In between task Avinash told Vivian if you want to take revenge and smash anybody you can do this in task. He was hinting for Rajat because he had pushed and physicall hit thwm before.

vinash to Vivian: “Whoever you need to grab and rough up, just do it.” 
Both of them picked Rajat up and threw him down.