Today, the 24th of Nisan, is an important historic anniversary. On this day, three days after the splitting of the sea, the Israelites were in the desert without water. They complained to Moshe, who threw a stick into a pool of salty water and made it drinkable. (Shemot 15:22-26)
Such an important event deserves to be memorialized by a custom. I suggest that everyone either: 1) Walk around all day holding a twig and/or throwing it at people 2) Drink (doesn't matter what) 3) Find someone you don't like and want to annoy, and start complaining. Vechol hamarbeh - harei ze meshubach.