I'm sure many of you remember this scene from Halo 3, well it didn't occur to me until now:
Could the flood/Gravemind "see" Master Chief inside that control room(?)
Where they aware of his presence in that room (whether or not he could physically be seen by them?)
OR was It just a coincidence one of the rocks from the High Charity attack happened to miss striking Chief (possibly killing him) by mere inches?
Sorry if what I'm asking is difficult to understand.