from the Department of Really Bad Ideas: a grenade demonstration … indoors

from the Daily Pakistan:  “A hand grenade exploded inside courtroom in Karachi’s Anti-Terrorism Court (ATC) after a judge asked a police constable if he knew how grenades worked. The constable, instead of explaining his expertise in weapons and grenade handling to the judge, opted to demonstrate practically by promptly pulling out the pin from the grenade. … “