During the chase sequence in which Batman reveals himself during The Dark Knight Rises, there is a sequence when Batman uses a pump action disruptor weapon against Bane's getaway motorcade.
Moments after we see how useful this weapon is, a rookie cop shoots the weapon, disabling it:
The next part really puzzles me: Batman throws the weapon down.
It's obviously useless to him: but he's just given over a piece of evidence to them, which seems hugely uncharacteristic of the Nolan-Verse Batman SOP.
During the Dark Knight Rises, his Tumbler even self-destructs after the Batpod is ejected, presumably to destroy any evidence that would link the vehicle to Wayne Enterprises.
I realize that he gifts a Young Joffrey with a surveillance device during the Batman Begins, but I think given the police attention these are different circumstances.
I also accept that the moment is funny, and understand it to be a nod to the audience that Nolan isn't going to let batman use his 'gadgets' to pull victory out of his a$!%hole, like times of yore...
But I still don't understand why he would throw the device down. It just seems incredibly sloppy for what has been typically methodical execution.
Does anyone have any insight on this?