There was an  unknown challenge between Max and me. 
WBF and EBL usually offer a souvenir plaque at the end of each championship. 
After a few championships Max and I decided that there would not be enough space in the house for future plaques and we decided to lose them, ops pardon, forget them. 
Believe me, it is not easy to "forget" a plaque! having your name written on it, most of the time “the plaque comes back the very next day". It had therefore become customary that the beer of the last night, well really the “first” beer of last night, would have been free for the one who was more skilled in "forgetting" the plaque. I confess that most of the first beers on the last night has been paid by me!