Some people definitely have a psychological problem with Prius, especially the Honda boys.
I am always cruising around at 60 km/h but whenever a Honda boy is coming from behind, whether he is in a Civic or even City, he accelerates harder just to give a flyby, although a few times i immediately turned on the POWER mode and did not let that dude overtake me. 
I have noticed this thing with people in smaller cars as well, Prius dekh ke Cultus walay mein bhi josh aa jata hai you can say 
Don't know what is wrong with these people, jaan boojh ke side karana, tailgate karna yahan ki awaam ki purani aadat hai.