The Rabbi is someone who loves to hear himself speak. While I would normally categorize him as a very nice man, he is also someone who likes to tell you the things he knows --NOT because he thinks it will help you in some way but because he wants you to know he knows them.
Throughout the seder he would stop and explain the significance of each part of the story to a room full of Jews. It was no one's first seder. We all know that the salt water is symbolic of the tears that were shed by the Jewish slaves in the land of Egypt. See that apple mixture? That symbolizes mortar in bricks of the Egyptian cities. NO SHIT. My poor nephew had the dubious honor of sitting next to The Rabbi. He was constantly being Taught throughout the seder. He is 15 years old and learned all this stuff from birth. While no one would ever call my nephew a shrinking violet, I think it showed amazing restraint that he didn't choke The Rabbi with a shank bone.
I finally told The Rabbi that we have all been to seders in the past BECAUSE WE ARE PRACTICING JEWS and that if he wanted to be a rabbi he should've done that. I think that stopped him long enough in his soliloquies to finally drink a little of his Manischevitz. But just a little.