Please help

Guys, Please help here. In today's episode they showed that Yash and Arpitha were on the phone when the accident happened. They show a black car that comes and hit it. Was it Yash b,coz of whom the whole thing took place or was it that he just screamed when he heard her. I am so sorry , I missed just that part. Can someone make it more clear?

Hey actually it was yash war nearer to aripta car and she dashed into the tree thats why car glasses were broken and she hit herself...which is unfortunately seen by yash so closely...