<human>: Actually years ago, but:

One time my brother and I were at the water park, hanging out in the wave pool beach area. A strange, lady in a one-piece walked by us and she had a crazed look on her face. It's pretty hard to look disheveled in a one-piece, but she did. Did I mention she was muttering to herself?

So she's carrying a long bag under her arm as she wades about ankle deep in a crowd of kids. When she was about twenty feet or so away, she was kind of like a silhouette, but I could swear she pulled a gun out of her bag. I mean it looked exactly like a lady holding a gun.  I told my brother, "hey, I think that crazy lady has a gun."
He says, "noooo..." then looks himself. Then he's like, "oh shit, I think she does have a gun." And right we're starting to wonder if this is real, another old lady next to us jumps up and starts yelling, "somebody stop her, that lady is going to shoot. She's got a gun! She's got a gun!!!"

Now hundreds of people turn to look at the shouting lady, including the lady with the "gun." 

And we now have a better look at the gun and it's just an umbrella.

The lady next to us quickly sits down and starts mumbling sorry. Everyone in the area is now talking about the crazy lady next to us.

She must have overheard me and my brother and started seeing what we saw. She could have have been a hero. She wasn't.

Provide a brief overview of the text.
<bot>: Lady next to us overheard us wondering if some other lady had a gun. She freaks out and starts yelling to everyone.