I heard about a minhag the other day (for the first time) and was wondering if there is any makor for it. I was told that people ran out to "catch" the water that was used to wash the Kohanim's hands before going to duchen by Nei'ilah on Yom Kippur. It's apparently a segulah for, well, something (maybe we'll find out more soon.) This minhag I have never heard or seen before (due to the fact I'm not a Kohen, Levi, or Bechor and didn't know about the minhag thus didn't run out of shul to catch the water when the Kohanim washed their hands!)
Has anyone ever heard of this? What's the makor (source)? Perhaps this has been mixed together with some other minhag?