The article discusses a method of exploiting hardware faults using a low-budget tool, specifically a piezo-electric lighter, to induce electromagnetic interference and flip bits in memory. This technique, known as fault injection, can be used to gain root access to a system. The author demonstrates the method by exploiting a laptop's memory bus and gaining access to the system. The technique relies on the ability to induce bit-flips in specific memory locations, which can be used to bypass security mechanisms.