Jordan Grey rocked hesitantly at the edge of the garage while the sound of electricity pulsed up a Jacob’s ladder in the corner. “Dad? Can we go now?”The 6-year-old didn’t quite know what to make of Rick Feuerstein’s demented horror lab last year on Halloween night – a 20-plus-year labor of love for the longtime medical instrument repair technician that grew up watching classic monster movies and still remembers painting his favorite ghoulish character models as a kid himself.