I was told never to pour a drink to someone with the underhand, but always overhand. Supposedly when doing a Tahara on a Mes they pour the water holding the pitcher with the palm up, not down. Can you shed any light on this subject? Is it a superstition? Is Tahara done in the underhand manner?

When pouring the water for the Tahara of a body one pours underhand, therefore one should not pour in this way. (Answered by Rabbi Ya'akov Ruza)