The Daily Pakistan newspaper, covering the Anti-Terrorism Court in Karachi in April, reported that a judge in Courtroom III asked a constable if he knew how the grenade entered into evidence worked. 

Rather than assume that a simple verbal explanation was requested, the constable pulled the pin to demonstrate, and the resulting explosion injured the constable, a court clerk and another police officer. Reportedly, the constable is said to be facing severe discipline as soon as he recovers. And hopefully, he’ll also get some basic training in when and where it’s appropriate to pull the little pin on a hand grenade.