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We've all seen our fair share of shocking ad campaigns. Flip through any fashion magazine and you'll see all kinds of edgy ads from designers.

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[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2009/images/07/30/am.intv.cattie.art.jpg caption="Cattie says he hopes his findings makes the system a little bit safer."]

New Yorkers will tell you they've seen strange things underground on the subway. This past weekend a subway rider saw a child 8 or 9 years old in the train operator’s cab and said it appeared she was teaching the boy how to run the train. He snapped a picture with his cell phone before getting on train.

The subway rider, Jules Cattie, spoke with CNN’s Carol Costello Thursday.

• Watch the full interview

Carol Costello: The story is so unbelievable.

Jules Cattie: Even in New York, it’s shocking.

Costello: You said you snapped the picture because you didn't think anybody would believe you.

Cattie: In New York people say crazy things all the time and you tell friends and people say ‘no, that couldn't happen.’ Well, this actually happened.

Costello: You're sitting on the train. When does this first come to your attention that a child might be in the driver's seat of this subway train?

Cattie: Well I left work, was going home to watch a U.S. soccer game and I heard someone kind of yelling instructions. But it didn't sound like a co-worker to co-worker, like training an MTA employee, it sounded like a mother and a child. The tone was like that.

Costello: So what was she saying to the boy?

Cattie: The words, I heard: ‘green, go, yellow, slow down’ and things like that which I thought that was kind of - the MTA has to have better instructed people if they don't know that green means go.

Costello: And at this time, the train was actually moving?

Cattie: Yes. Yes.

Costello: So was he doing a pretty good job?

Cattie: It’s a rail so I don’t know. It was going and then we eventually - the train stopped at UNION SQUARE and the train was delayed a little bit and all of a sudden the young boy came out, popped the door open and announced why the train was delayed.

Costello: The little boy popped out and said why the train was delayed, the same kid that was driving the train?

Cattie: At this point, I didn't know that. He popped out and made the announcement. Everybody on the train kind of nervously looked around and giggled like ‘did that really just happen?’ And it's kind of shocking and he went back in. At that point I went up to the cab to kind of investigate and see what was going on.

Costello: You went up to the cab to investigate and what did they tell you?

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