Different Ways Of Describing Observed Or Imagined Events

I have read that sometimes on a subatomic level a particle-antiparticle pair is created but the antiparticle almost immediately mutually annihilates with an already existing particle. Is this creation and annihilation or a single particle zigzagging spatiotemporally? On a macroscopic level, it would mean that, as a man, A, walks across a city square, something appears or materializes nearby. The materialization immediately splits into two men, B and C, identical with A and with each other. B walks forward on a path parallel to A's whereas C walks backwards towards A and collides with him, whereupon C and A disappear. Are they A, B and C or just A zigzagging spatiotemporally?

Sf writers usually imagine bodily continuity of a time traveller between his departure and his arrival. HG Wells' Time Traveller and Poul Anderson's mutant time travellers become mysteriously invisible and intangible but do continue to exist while time travelling whereas Anderson's Time Patrol timecycles and their occupants merely disappear and (re) appear. In Responses To Time Travel, I wrote:

"It is not logically impossible for a five minutes older version of me to appear and then to coexist with me for five minutes before I disappear. In other words, I would have time travelled five minutes into the past."

 However, this event can be described non-chronokinetically, i.e., without reference to time travel: a duplicate of me with prescient memories is created five minutes before I am annihilated. Futureward time travel is even easier to account for: I am annihilated and later re-created.

Bon voyage.