"How could you?" Dick yelled at Bruce. "Not only did you bring out someone who hasn't even had a year of training, and Batgirl after she's recovered for a day! To one of the most dangerous places in Gotham!"
"Robin, listen-"
"No, I'm done listening."
"Robin! I volunteered!" Barbara yelled.
"He still put you in danger!" He looked at Jason lying on the floor. "That's it." He said, grabbing his mask and logo. "I quit."

When Barbara arrived home, she found a note on her window-sill.
Babs,
I can't stay here anymore. Bruce and I have been fighting more than usual. I'm almost seventeen. I'm going to Blüdhaven for a while, till we patch things up. I need to talk to you. Meet me on the Wayne Enterprises building tomorrow, just before dawn.
-Dick.