It's a tense scene. Terrorists are holding a bus load of school kids hostage. Far away in the commando training school, a brigadier is briefing one of his key officers, Major Chauhan, on the rescue mission.

"We have some slides of the area, Colonel VK Singh will explain it to you," he says.

The Major Chauhan in question is Nana Patekar who also directed the film Prahaar two decades ago.

The grim, square-jawed Colonel VK Singh, is now General Vijay Kumar Singh, the new chief of the army staff. A mention of the small non-speaking cameo which hangs for a few seconds in the film, elicits a grin from the army chief who was an instructor at the Indian army's commando training centre in Belgaum in 1990.

"They were shooting the film in the centre and wanted a real officer to sit in the scene," says General Singh, the first commando to become army chief.

Indian army chief did a cameo in Bollywood