As clearly American as a painting by Norman Rockwell, Vacaville’s joy in the main tree will illuminate every corner of our hearts and our hearts for the 37th time on Tuesday. Before the rains came, there was a spectrum that PG&E could disconnect first. God free us. That was a new “what would happen if” on the 37-year list of “what could go wrong?” Will the tree appear? Will the p.a. system go south? Will the live camel of the Nativity be released and scare the carriages? To that I add, what happens if the switch is released and nothing happens? That has been my biggest fear for 36 years, long before the north winds, dry grass and power lines got in the way. When the crowd made a ten-to-one countdown, I closed my eyes and muttered: Lights, don’t fail us now.