Section 4. Actions against amusement ride operators.
It shall be the duty of each rider to heed all posted and oral warnings and to refrain from acting in a manner which may knowingly cause or contribute to the injury of himself or others or in a manner contrary to prohibited acts for riders set forth in section 3. Notice of these prohibited acts shall be displayed as set forth in section 5. Proof that a rider sustained an injury in the course of knowingly acting contrary to section 3 shall be evidence of comparative negligence in a suit against an operator by that rider.