system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do some of us sneeze when going from darkness to sunlight?
gpt
A.C.H.O.O. Syndrome (yes,seriously) aka “photic sneeze reflex”  isn’t fully understood but is thought to likely be caused by the fact that eye and nose nerves run into the brain in the same place so a very strong signal from the eyes might get misconstrued as a signal from the nose needing a sneeze to clear it.