Kid: "We might run into Ms. S and C. at the park."
(Ms. S being her teacher and C her 3-year-old daughter)
Kid: "yeah! If they decide to go sledding too. And if they decide to come to our park."
True. It might happen. Just highly unlikely and I certainly wouldn't bank on it.
Incidentally, the sled at our park is not really a hill - more of a slightly elevated are. Hardly a sledding destination unless you are worried that your kid is going to try dangerous stuff at a real hill.
We didn't run in to her teacher or any of her friends. But, she did jump on top of me and stick snow in my face.