In the late 1990s I went to a RealNetworks developer conference and Andreesen, then at Netscape, was a keynote speaker. I was curious and open to his insights, but his talk was so vapid (I remember he kept giggling) and arrogant that I eventually walked out. I remember he kept bragging about Netscape's next big project (something after Netscape 5 maybe?) and how it was going to wipe Microsoft out permanently. Only a few years later did I realize whatever it was never shipped, it turned out to be vaporware.