What is the test for a charge of second-degree felony murder?

Defendant's theory is an offshoot of the felony murder rule. "The felony-murder rule makes a killing while committing certain felonies murder without the necessity of further examining the defendant's mental state. The rule has two applications: first degree felony murder and second degree felony murder.... First degree felony murder is a killing during the course of a felony specified in [Penal Code] section 189, such as rape, burglary, or robbery. Second degree felony murder is 'an unlawful killing in the course of the commission of a felony that is inherently dangerous to human life but is not included among the felonies enumerated in [Penal Code] section 189....' [Citation.]" (People v. Chun (2009) 45 Cal.4th 1172, 1182.)