John Spalding is a humor columnist for the on-line magazine Belief Net, and the author of “A Pilgrim’s Digress: My Perilous, Fumbling Quest for the Celestial City.” Spalding went for a joyride in the flamingo pink hearse belonging to Gerri Guadagno and Gayle Stimier, the quirky proprietors of the Dying-to-Get-in Company. And he tells us all about it.