Rav Mordechai Chaim of Slonim zy’a (quoted in Sefer Kovetz Eliyahu) said in the name of ‘a certain chasid from Tzefas’ that the Kaliver Rebbe would immerse every Friday in the town’s mikvah in Tzefas. (He would go there from Kaliv through miraculous ways.) One week, he took along with him his shamash and right-hand man, R’ Yaakov Fisch zt’l, but he forgot to take him back with him.
When Rav Yaakov emerged from the mikvah, he saw Jewish men dressed in white Shabbos clothing, as is the custom in Eretz Yisroel. He was very confused and asked where he was, and he was told that he was in Tzefas. He had no idea how he had gotten there and he was very confused.
On Motzoei Shabbos, he met the Kaliver Rebbe in the street and the Rebbe told him, ‘I forgot to bring you back from Tzefas. Let’s go now.’ And he took him back to Kaliv.