next time bring a clue, not a paintball gun (meaning)

Question

From the movie Terminator 3: Rise of the Machines

If you have not seen the movie, here's a short summary to give you come context:

John Connor in the middle of the night breaks into a pet pharmacy to steal a bunch of pills because he's suffering emotional breakdowns or something like that. But the person who works there by pure chance also arrives at work a few moments later. She catches him and is about to call the cops. John Connor has a paintball gun on him. He whips it out and points at her with it, but messes up for a second which gives the pharmacy worker a chance to wrest it from his hands and fire a few rounds, but Conner is unharmed because the gun is obviously not real. Despite all that, she manages to kick his butt into a big cage for animals and lock him up in there. And then she says this:

Next time bring a clue, not a paintball gun.

I have no idea what she's saying.

Post scriptum:

I might not be one hundred percent accurate in my description, but that's the basic idea of what was going on in the scene.

Answer 1

That doesn't make too much sense to me (a native speaker) either. Here's what I think it means:

People say "get a clue" to say that someone should learn more about a situation - usually, but not always, social. I think this is playing off of that expression and trying to say: "instead of bringing a paintball gun, you should have brought [in your mind] the knowledge of how to deal with these situations". She's telling him that he didn't prepare enough and calling him stupid.