Grillo's face is 'scary', says ex-premier
Berlusconi scoffs at opponent's cancellation of TV interview18 February, 15:06
Centre-right leader Berlusconi told Sky TV reporters that Grillo's natural stage was a soapbox.
Grillo's M5S was rated third in the polls with 15% before a pre-election blackout of surveys kicked in earlier this month.
The Genoa comic and recently emerged political tub-thumper, who uses the Internet and rallies to spread his message, was meant to give a rare interview to Sky Italia on Sunday but he cancelled it at the last minute.