This Robin Williams foto contains
fedora, vilten hoed, homburg, cowboyhoed, trilby, fedora met vilten hoed, and stetson.
There might also be
vierdeukenhoed, campagne hoed, snap rand hoed, module rand hoed, bever, and castor.
@m1kester -Williams comes onto the stage and gives an unplanned stand-up routine during technical difficulties. Sergey Brin & Dan Gilbert are on the panel.