"The brainpan of a sparring model ordinarily contains a printed cellular replica of a brain. A trainer, nothing cognitively functional. Registers levels of concussion, indicates less subtle trauma. The user can determine the exact efficiency of blows delivered. But the trainer, and for that matter the modular cranium, aren’t user-serviceable. A person or persons unknown voided the studio’s warranty, on the drive from Shoreditch. They removed the trainer, replacing it with an explosive charge. It would have approached you, then detonated. Unaware of that, I called in flashbots. The four nearest responded when my request cleared. They positioned themselves around its head and simultaneously detonated. A mere fraction of a gram of explosive each, but correctly distanced, precisely spaced, sufficient to immobilize virtually anything. Instead, we’re very fortunate my actions didn’t result in at least one death."