Starkbierfest. Aventinusfest. Madnessfest! Madness? Almost suicidally so, I’d say, a fest where the main beverage is a glass of beer with almost 7! units of alcohol.
It’s fascinating to see that Germany has a very extensive beer culture with a whole set of customs, behaviours and rituals. For tourists it might be confusing, as waiters/waitresses will seem quite curtly a lot of the time, until you adhere to the customs or are in any other way found okay, then nothing is too much.