In brief, I had some issues with Dr. Runge started by the long summer vacation I took due to a delay in my visa renewal by the US embassy and ended up by the issue of a broken machine that I was held responsible for it. In my opinion, the main issue that triggered the conflict was a bead beater instrument, as shown in the below figure, that I used for three weeks. I used it to get cell lysates to measure the protein concentration and the enzymatic activity of alkaline phosphatase using another machine, VICTOR2 spectrophotometry. The bead beater worked fine but the metal cap holding the samples in the rotor-like part was getting loose. I assumed this looseness may come from a fraction between the incorrect capping and the nail threads. As a