Police officers are trained to not be too 'quick on the trigger'. [=eager to fire a gun]
The timer was set to 'trigger' the bomb in exactly one hour.
The faulty wire was the 'trigger for' the explosion.
(..) kill myself to wake up, right? I wouldn't do that if I were you, Mr. Fischer. I believe they have you sedated, and if you pull that trigger... ...you may not wake up. You may go into a further dream state. Now, you know what I'm talking about. You remember the training. Remember what I said to you. (..)2010 Inception