It can be assumed that the Author, while watching a television show by himself, heard the line “the moment my brother died, I felt a searing pain in my heart” and immediately sprung from his bean bag chair to write down the line and a single word: “PHYSICS!” That word was then underlined and circled, thus beginning the creation of another scientific-concept-transposed-into-real-life cartoon.
In the cartoon we see a man describing the grief he felt during his brother’s death to a second man. The second man, a physicist, is then shown giving three possible verbal responses that serves as examples for right, wrong and very wrong answers.
The first response is a simple condolence that one would expect for the given situation. The hilarity begins in the second response, in which the physicist takes the word “moment” into the context of his profession, specifically within the topic of causality (cause and effect). He asks if the pain felt (effect) truly happened in the same moment as the brother’s death (cause), or if there was a delay from the speed of light - the maximum speed at which information can travel according to physics.
The third and most ludicrous response from the physicist has him imagining an experiment involving the killing of the first man’s other siblings in order order to use the instantaneous cause and effect to violate the rules of causality and send signals back in time.
There you have it readers, the Author has managed to turn a man’s death into a homographic pun involving physics and time travel.