You're the Hundred Kmph Granny (100キロババアだろ 100 Kiro Babā Daro?) is the seventh chapter of the Dandadan manga series.
Summary[]
With no other option to escape the mob of possessed humans, Okarun enters his Turbo Granny form and carries Momo as he rushes through the crowd. The two then end up suffering from the turbo speed, which also results in Momo accidently letting go of the Turbo Granny inside Okarun. After kicking them away, which knocks Okarun out cold, the Turbo Granny fuses herself with the Earthbound Spirit Crab and gets herself ready to play cat and mouse with Momo. Though the Turbo Granny told her that she will give Momo a few minutes to run away, Momo responds back by saying that she will get away from her in one second after using her psychic powers to grab on to a moving train. The Turbo Granny catches up to Momo with confidence that she will not escape her but soon comes to realize that she had been tricked into following Momo after the girl reveals that her grandmother had set up a trap on the railway that was leading to Kamikoshi City. Using her powers to restrain the Turbo Granny from escaping, Momo successfully manages to defeat the Turbo Granny-fused Earthbound Spirit Crab the moment they made it to the trap.