“We weren’t quite prepared for what would happen with Twitter,” said its founders last night on The Late Night Show with Jimmy Fallon. Twitter founders Biz Stone and Evan Williams took the stage with comedian and actor Rainn Wilson.

Fallon brought up the original criticism for Twitter which was “Twitter is not useful.” “Neither is ice cream,” Williams said, “Should we ban ice cream and all joy?”

How’d you come up with Twitter?” Fallon asked. Biz Stone answered, “From the very beginning it was all about mobile…We had names like Jitter and Twitch and near Twitch in the Thesaurus was Twitter…Twitter was a real word that meant little chirping birds in the trees so we went with Twitter.”

Watch the full interview here: