My favorite Hoaxlandism (so far) is when he said, during a single presentation, that the "Face on Mars" was symmetrical and therefore artificial, and then turned around and said that when each half was mirrored, it formed two different faces -- one a humanoid, the other a lion -- and therefore wasn't symmetrical. :')
Years ago I mailed a similar one of these to Hoagie before someone put pixel putty on the smashed side, but never received an acknowledgement. FACE