When a bartender (or barback) goes into the small closet they call an office, and they take a line (or bump) of white powder (more specifically, cocaine)
Note: the door is typically halfway closed as they awkwardly lean over the keyboard/PC monitor
When you've been partying hard and had very little sleep and you know you have to go out and do it all again the next evening, so you have a quick nap before hitting the booze again. So called because of the 24/7 party scene in Berlin which leaves very little time for sleep.
"Man, I feel like shit - I think I'm gonna have to have a Berlinpower-nap before I go out again tonight"
Feeling refreshed or charged after closing eyes for 1 to 10 minutes. Over 10 minutes becomes a full nap. Some have even associated "visions" or "dreams" during a mini power nap.
1. I swear bro, everything became clearer to me in macro economics class after a mini power nap. Ever took one?
2. You can tell from the doodle on the page that s/he took a mini power nap during class/board meeting/church.