Of course, Tracy had finished the speed force bazooka, so there still wasn’t too great a reason to panic.
Despite the best efforts of the Scarlet Speedster, Kid Flash, a seasoned detective, and a brain trust, Savitar managed to kill one of their own.
Barry showed up and channeled his inner Ghostbuster to unleash the bazooka on Savitar, and it really seemed to be working… until it very suddenly wasn’t.
Using a piece of calcified speed force energy — which is apparently a thing — Savitar spared himself the effects of the bazooka and impaled Iris, just as we’d seen back in the midseason finale.