Pouca gente sabe como a limpeza é feita quando o assunto é siderurgia. Quando um pote com toneladas de aço a 1500°C é esvaziado, o que sobra gruda e solidifica por dentro. Quebrar essa crosta exige força bruta, às vezes um braço hidráulico inteiro. Isso se chama deskulling.
During World War II, for example, three German submariners escaped from Camp Crossville, Tennessee. Their flight took them to an Appalachian cabin, where they stopped for a drink of water.
The mountain granny told them to "git." When they ignored her, she promptly shot them dead. The sheriff came, and scolded her for shooting helpless prisoners. Granny burst into tears, and said that she would not have done it if she had known they were Ger-mans. The exasperated sheriff asked her what in "tarnation" she thought she was shooting at. "Why," she replied, "I thought they was Yankees!"9