On accidental learning...and other things you maybe SHOULD have already learned...

Crutches Boy: When a force acts on something there will be an equal and opposite force reacting... did you teach me that?
me: Not yet...maybe you heard Rev Tom say it?
Crutches Boy: No...I think I might have accidentally learned that in science last year!


And I wrote this down but I can't really remember the context. I think it was Crazy Contacts Girl, but I don't remember what I said that made her respond like this.
CCG (putting her hand to her chest): Aw. That touched me. (then, whispering to girl sitting next to her) Is this where your heart is?