We have held that violation of company rules is willful misconduct. McCullough Unemployment Compensation Case, 197 Pa. Super. 389, 178 A.2d 813 (1962); Heib UnemploymentCompensation Case, 197 Pa. Super. 387, 178 A.2d 812 (1962). Decision affirmed.

Gagliardi UnemploymentCompensation Case, 186 Pa. Super. 142, 141 A.2d 410 (1958). See also: Heib Unemployment Compensation Case, 197 Pa. Super. 387, 178 A.2d 812 (1962). Even without any rule of the company about firecrackers or a prohibition of the use of fire-crackers, the use of such a known dangerous instrumentality resulting in the injury of a fellow employe comes within the judicial definition laid down by this Court.