Read it now : "They're Made out of Meat"
By Terry Bisson
In East of the Web
Genre: Science Fiction
Word Count:850 approx. (Flash Fiction)
This is a very short story told entirely through the dialogue of two aliens who can't cope with the idea of Humans. It has actually been made into a very short film (not as short as Bambi Meets Godzilla, though) which you can view at YouTube. The film won a prize at an SF short film festival in Seattle in 2006. Bisson mentions this in his biography.
Before you view the film, though, you may like to experience the unbodied voices speaking in the text version.
Read it here.