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The Batcave is filled with the sound of various bats training. Bruce had decided they needed more "bonding time". Based on how he'd treated Tim when he first tried to weasel his way into the Robin position, Tim found it a little funny. He kept that thought to himself, though.
Tim whirls the bo staff between each hand. It took him some time to get used to the weight and heft of the weapon, but it's like an extension of himself by this point. He watches the staff spin against his palm and between his fingers. He's so focused, the sound of Jason thudding from behind him startles him.
The bo staff catches Tim in the chin. Jason snickers behind him.
"Don't." Tim says.
"I didn't." Jason says. Tim shoves his shoulder. They start sparring in an instant. The bo staff is back to an extension of himself. Tim grins.