Can I...?

Yesterday during work time last hour (my algebra class)...

A student walked over to me, handed me his planner and a pen, and asked, "Miss Grivna, can I go to the bathroom?"

I respond with my normal: "I don't know, can you?" Even though I'm a math teacher, I still prefer hearing correct grammar usage in my classroom.

"I'm not gonna say it."

Oh, two can play at this game. "Then I'm not gonna sign it."

Silence.

"Fine. May I go to the bathroom?"

"Yes, you may."

Hah.