When Ben Kingsley has Jamie at gunpoint, Antonio Banderas instructs her to use the taser.
Anyone thought this was risky?
When she uses it, Ben Kingsley points the gun upwards, taking it off Jamie’s head.
Who is to say that he wouldn’t have pulled the trigger right as he felt the shock?
Ben Kingsley was anyway about to kill everyone, he would have shot 99% if he had got what he want - he was a professional. So the taser chance of 50/50 is better as 99%. Also it's more likely a professional NOT trigger accidently a shot, as he is used to weapons.
The taser would be only risky in a situation where you are quite sure the person does not want to shoot like a desperate junkie or someone pressed into this situation.