Title text:
Unstoppable force-carrying particles can't interact with immovable matter by definition.
Transcript:
[An arrow pointing to the right and a trapezoid are labeled as 'Unstoppable Force' and 'Immovable Object' respectively.]
[The arrow is shown as entering the trapezoid from the left and the part of it in said trapezoid is coloured gray.]
[The arrow is shown as leaving the trapezoid to the right and is coloured black.]
[Caption below the panel:] I don't see why people find this scenario to be tricky.
Source: https://xkcd.com/3084/
The pie went bad and disintegrated. Its energy got reconverted into the 0 that is all.
If its not clear i was not being all that serious with my last comment. Re constructing math from my own first the principles is something i prefer to do as a hypothetical mind game rather then to find a real profound breakthrough.