While reciting the Haggadah at the Seder, the tzaddik Reb Levi Yitzchok of Berdichev, would be filled with excitement and tremendous passion. Reaching the words ‘Matzah zu,’ he would become so caught in dveikus that he would fall from his chair to the floor, overturning the kairah, matzos and wine. By the time he came to, the table would be set afresh, and another long white kittel would be handed to him to replace the one stained with wine. Putting it on, he would say with visible delight, “Ah! Matzah zu…”
(סיפורי חסידים זוין, מועדים, ע’ 367)
