I saw a guy carrying a giant pole that had a girl with a giant swinging booger attached to it. It was a performance art exhibit that used the entire convention hall as its booth—he just walked around saying sumimasen, sumimasen the entire time.
Two guys were dancing erratically with cardboard boxes on their
heads. The TV screen showed a video of
them running around doing more random things. They were selling small figurines of people with boxes on their heads
for about 100 to 200 yen.