why target switching of smooth camera not very smooth ?

Hi , i am trying to change the targets of the smooth follow for the camera to follow the player. There are many power ups like car bus in which the player takes to increase his speed here like ski safari game. I am changing the target of the camera when the player triggers with the car or bus which is bigger in size then the player. There is a slight jerk in the camera when changing the targets, i have tried both smooth damp and lerp none of them gave the desired effect.. someone please help me to achieve this..

thank you !