As you might have heard, at the moment there is a worlwide pie-throwing movement active.
What they do is throwing pie's in the face of innocent hard-working tax-payers like Bill Gates of Redmond-based software giant Microsoft.
Nobody knows who the leader is of this mysterious movement or what their aim is.
This rare picure shows that Bert has been seen at the scene of one of the most recent pie-incidents.
It is a publicly known secret that Bert has been supporting Linux from the beginning, so we have reason to believe that he is one of the major forces behind the Pie Terrorists..