Ibn Tumart
After his studies in Baghdad, Ibn Tumart is claimed in one account to have proceeded on pilgrimage to Mecca ("hajj"), but was so bubbling with the doctrines he had learnt and a one-minded zeal to 'correct' the mores of the people he came across that he quickly made a nuisance of himself and was expelled from the city. He proceeded to Cairo, and thereon to Alexandria, where he took a ship back to the Maghreb in 1117/18. The journey was not without incident - Ibn Tumart took it upon himself to toss the ship's flasks of wine overboard and set about lecturing (or harassing) the sailors to ensure they adhered to correct prayer times and number of genuflections; in some reports, the sailors got fed up and threw Ibn Tumart overboard, only to find him still bobbing a half-day later and fished him back (he is also reported in different chronicles of having either caused or calmed a storm at sea).