Which One Isn't Like The Others?

A smörgåsbord of quotes; which one wasn't spoken by my students? [note: non-essential details have been changed to protect the identities of the speakers.]

1. "Yeah, they said my hands were lethal weapons. I mean, I boxed in elementary school."
2. "I'm going home right after this so I can watch Law and Order!"
3. "Yo, Capricorns for life."
4. "I get it now! Thanks Mr. K!"

Please don't say "4".