Don't go there

Yesterday, as I was filling up my cup from watercooler next to the coffee machines, one of my co-workers was getting some coffee. He decided to try to make a little joke.

He said, "Hey, you know what's gonna happen if you drink all that water don't you?"
I replied, "It's just gonna make me have to go pee?"
"That's right." He said, a little deflated.

Today I happened to meet him again as I was carrying my oatmeal over to the microwave to heat it up.

I teased him, "You're not going to say anything about this are you?"
"No, no, I'm not gonna go there!"