Regardless, he takes it and starts spinning it around before throwing it which was entirely unnecessary and only for show. He could've just as easily deflected it to a safer location.
To me, the scene that most defined what the Jedi order had become and why it needed to end was at the big fight scene at the end of Attack of the Clones where Yoda and Dooku were dueling. When Dooku pulled a pillar down with the Force and then Yoda used the Force to catch it to prevent it from falling on to Obi-wan. He then made a spectacle of it by spinning it around before throwing it back at Dooku. What he should have done was just use the Force to move Obi-wan and Anakin to a safe position and continued to pursue Dooku. That scene just demonstrated how full of himself Yoda had become. And it took until his duel with Palpatine before he realized that he was a large part of what had gone wrong with the Jedi order. I also always felt that he intentionally withheld a lot of information about the Jedi order from Luke in order to prevent him from rebuilding a similar system.
My first thought was that he meant that trains were run on Windows Me. That is a scary thought indeed.