A girl wrote an article about participating in the Berlin Marathon as elite (she ran a 3:08 but someone in her family knew the organizers). The article is pretty cool, and she has a paragraph about the technical meeting:
"The day before the race, I attended a technical meeting for the professional athletes which was pretty fascinating. They had very specific protocols for every little thing. At the start of the race, they would announce the top contenders on the loudspeaker and TV. The athletes were to smile, wave, and essentially do something that would look good on camera. At the end of the race, the winner was to celebrate with their arms wide so that all the race sponsors on their bib would be visible for photos. They were also instructed to show emotion and hug their coach or manager. You know, just in case you forget what to do when you win a major marathon!"
Here's the link to the whole article:
https://runningliz.com/2015/10/14/i-left-my-shoes-in-berlin/