"All right," said Masklin. "But you're not to fly down low again and try 
to read the signposts. Every time you do that, humans rush into the streets 
and we get lots of shouting on the radio." 
"That's right." said the Thing. "People are bound to get excited when 
they see a ten-million-ton starship trying to fly down the street." 
        -- (Terry Pratchett, Wings)