When provoked, Rhinos try not to go berserk, which is not always easy, by any means.
The Rhino Rule of Thumb is to count to Three, go thrash a shrub or other natural feature, and then count to Three again. Counting involves mental effort, and the thrashing helps blow off steam. The sheme can be repeated as needed, assuming the Rhino in question has not run amok.
We must face the fact: no System is foolproof.