The bakkie driver then rams into the back of the Tazz, pushing it out of the way, and drives off. A person can be seen falling on to the road as the Tazz is pushed.
Police spokesperson Captain Mali Govender confirmed that the incident occurred on Sunday afternoon in Makhanda (formerly Grahamstown).
Govender said details were still "very unclear".
"The owner of the Tazz opened a case on Monday. At first it was a case of assault to cause grievously bodily harm, but it has been changed to common assault."
She said the owner of the bakkie did not immediately report the incident to police.
No arrests have been made.