If everyone else is doing it, then it must be cool, right? Our basic human instinct consists of taking up challenges and proving our mightiness to the rest of the world, no matter how crazy. One of the Craziest Challenge is condom challenge. The Condom challenge is a viral craze, involving filling up a condom with water and dropping it on someone’s head. Twitter users have used this to promote the message that no one is too big to wear a condom. Top 10 most popular online trends and Youtube challenges.