The article revisits classic code examples during summer break, starting with a discussion of source code. The author, Christian, notes that in German, "quellcode" directly translates to "source code." He humorously coins a new term, "quäl-kot," which combines a German expletive with "source code," to describe particularly egregious code. This evocative term is inspired by a poorly designed interface encountered in the codebase.The problematic interface is presented as a C# code snippet. It is named ITableSelector and contains an excessive number of methods for selecting tables. Specifically, it has methods like selectTable1(), selectTable2(), and numerous variants for tables like 4a/4b, 7a/7b, 9a/9b, 14a/14b/14c/14d, and 21a/21b. The interface continues to list methods all the way up to selectTable31(). This extensive and repetitive list highlights the interface's design flaws. The sheer volume of similar methods indicates a lack of abstraction or a poorly structured solution. Such an interface suggests potential problems with maintainability and extensibility.