Bart, along with others connected to the Speed Force, are struck with severe pain when Barry accidentally kills the speedster Savitar by merely touching him.
Bart proved to be a useful ally to the other speedsters -- although he wasn't without his problems.
Bart sacrificed himself heroically, distracting the Rogues while Val deactivated the machine.
Due to Bart being previously deceased, he was open to possession.
Bart allows himself to be recaptured by Brainiac and is placed into a stasis pod, destroying Brainiac's security program from the inside.
At the behest of Tim Drake, Bart travelled to and saved from members of the while she was sleeping in her apartment.