What is implied malice for the implied malice of a defendant in the second degree felony-murder doctrine?

Implied malice, for which the second degree felony-murder doctrine acts as a substitute, ⁸ has both a physical and a mental component. The physical component is satisfied by the performance of "an act, the natural consequences of which are dangerous to life." (People v. Watson (1981) 30 Cal.3d 290, 300, 179 Cal.Rptr. 43, 637 P.2d 279.) The mental component is the requirement that the defendant "knows that his conduct endangers the life of another and ... acts with a conscious disregard for life." (Ibid., internal quotation marks omitted.)