I seem to recall reading in a post that l'hermittes isn't necessarily only felt when you bend your neck forward. That it can be felt in your arms, legs, hands, feet. I frequently get a zap from my elbow, or slightly higher, to my fingers, and from my knees to my toes. Only once, that I recall, from my neck. Well, one day of little zaps.
Could that be considered l'hermittes? Or is it just from the neck?