Eliyahu Sees Rav Lieber
The Baal Shem Tov is quoted as saying that many tzaddikim merited a revelation of Eliyahu Hanavi, but with Rav Lieber it was the other way around. It was Eliyahu who had a revelation of Rav Lieber.
The tradition behind this is that Rav Lieber was busy with the redemption of captives, and told Eliyahu that he had no time for him.