Question: When Zorg is on the phone with "Mr. Shadow", he gets very nervous and starts sweating. Then a black, gooey substance starts running down that nose...what is that?
Michael Westpy
17th Feb 2004
The Fifth Element (1997)
Answer: It's supposed to be concentrated evil.
So, Hershey's chocolate syrup.
Chosen answer: It happens to everybody who speaks with Mr. Shadow, but it's never really explained what it is. I think it's only written something like "a brown substance" in the scenario.
Answer: The substance is actually blood - in extreme cases some people have been known to secrete blood from their pores. I believe it is a Biblical reference even when encountering extreme anguish or in this case the ultimate Evil it is simply More Than The Human Condition can bear and causes any human that interacts with it to break down on a physical level therefore leaking life out of their body uncontrollably.