I can see it now. Hospital bed, dopey plod guarding the door. Meena asks for a coffee: 'Well I shouldn't really but...', off s/he obligingly goes. Escape!
Meena acquires a tank, a cannon and various firearms. Lumbers in to village at 100mph, singing, 'Here Come the Hotstepper'. Eliminates random villagers.
Escapes in awaiting submarine cunningly hidden in nearby River Wharfe.