Chat Roulette lets you chat with complete strangers (Warning: Some chatters are pervs and display things that will make your eyes bleed!). Merton does piano improv with random, unsuspecting strangers on Chat Roulette and has become a viral sensation on YouTube. The original video had over 4 million views, but he had to modify it to make YouTube happy.

Merton has grown so popular Ben Folds Five performed an ode to Merton in front of 2,000 cheering fans.

Finally this guy’s explanation of chat roulette is pretty good (and a little funny)