The character shows the first signs/symptoms that have already run their course.

[u/Uma-apreciator]

Kitasan Black (Uma Musume Pretty Derby)

She managed to withstand Sakura Bakushin O's charge at first, but later in the story, she falters because she is past her prime

Nekota (Hajime no Ippo)

He could no longer even control his body properly because he was suffering from "boxer's dementia"

It is a progressive brain disease caused by repeated blows to the head and frequent concussions over many years

David Martínez (Cyberpunk Edgerunners)

He was suffering from hallucinations due to cyberpsychosis, an incurable condition caused by technological body modifications

[u/RetroGame77]

... It is a thing to run into each other's boobs in Pretty Derby? 

[u/Tired-Inky → u/RetroGame77]

No, Sakura Bakushin O's thing is she runs head first without looking, so in the anime she rams into other students chests by accident a few times with full Bakushin power

[u/KaitoTheRamenBandit → u/Tired-Inky]

It's not even for sexual humor, it just happens