N.J. Stat. Ann. § 34:15-7.1

An accident to an employee causing his injury or death, suffered while engaged in his employment but resulting from horseplay or skylarking on the part of a fellow employee, not instigated or taken part in by the employee who suffers the accident, shall be construed to have arisen out of and in the course of the employment of such employee and shall be compensable under the act hereby supplemented accordingly.