Theretofore and long existing, the rule prevailed that the factum of an injury arising out of and in the course of employment fell under the rule that the commission's finding thereon would not be reversed if supported by competent evidence. Oklahoma Gas Elec. Co. et al. v. Santino et al., 158 Okla. 70, 12 P.2d 221; Magnolia Pet. Co. v. Porterfield et al., 161 Okla. 150, 17 P.2d 418; Nash Finch Co. et al. v. Harned et al., 141 Okla. 187, 284 P. 633; Ryan v. State Indus. Comm., 128 Okla. 25, 261 P. 181; City of Kingfisher et al. v. Jenkins, 168 Okla. 624, 33 P.2d 1094. In City of Kingfisher et al. v. Jenkins, supra, Mr. Justice Bayless, speaking for the court, said: