Good luck with your Enduro. Not sure if this is a restart or not, but you will know right away how you stack up against your row mates. If they pull ahead of you, track em down, if you are ahead of them, track down the group in the minute ahead of you. You will have a blast.
I doubt you will have "shadows" creeping in your helmet by the end of the race like me, as you likely ride fast enough.