All The Tropes Wiki Project, Part XIX

[Labster]

I can explain, but you're not going to like it.

Forgot About His Powers:
     Has magical ability and doesn't remember it
Remembered I Could Fly:
     Has magical ability and does remember it
Forgot I Could Change the Rules:
     Has mundane ability (law subtype) and does remember it
Idiot Ball:
    Has mundane ability and doesn't remember it
    - Probably not the right trope but the closest I could find for this quadrant
Remembered Too Late:
    Something and doesn't remember it
    - Probably a supertrope to the "doesn't remember it" type
Just in Time:
    Something and does remember/do it
    - Probably a supertrope to the "does remember it" type
Forgot I Couldn't Swim:
    Lacks ability and doesn't remember it
    - Almost all examples are about swimming specifically, except some are about fear of heights and flying.  Comedy trope.
Reed Richards Is Useless:
    Has magical ability and doesn't remember to reuse it
    - Generally used because the character's overpowered stuff would wreck the setting