We've all been there. I left the gas off, once. A plug wire came un-pluged at the coil while cleaning, once. Kill switch, once. A blown fuse left me stranded far from home at night, easily replaced, once. Ran out of gas, more than once. Going to the race track with my '69-1/2 6-PACK Super Bee, I rebuilt the carbs. Couldn't get it to start. Found out I could have won as I would have been the only car in the class. Discovered too late that I forgot to prime the rebuilt carbs to get the gas flowing. Sat at home fuming for NADA!