[As angry as he is, Beastboy doesn't want to get arrested. So he begrudgingly stands up and moves for the door snatching a roll of mints off a display]

Have you SEEN the way he treats you and the rest of the Digital World? How can you stand up for that?

[Out of nothing but spite he takes a bottle of soda from his bag, uncaps it and drops the mints in causing a sticky geyser]

You're going to get exactly what you deserve some day.

[And he's leaving, finally]