In a world where time flows backward for a person whenever they jump into the air, what happens during a conversation between Femi, who is aware of the time reversal effect, and Yoshi, who is experiencing this world for the first time, if Yoshi jumps while speaking?

Respond briefly.
Femi and Yoshi stand facing each other. Yoshi, unaware of the time reversal effect, jumps up while in the middle of a sentence. When Yoshi is in the air, time flows backward for Yoshi. Yoshi's words start to reverse, undoing the part of the conversation that occurred after the last time Yoshi's feet were on the ground. To Femi, it appears as if Yoshi is speaking backward and retracing actions.

From Femi's perspective, unchanged by the time reversal since he remains on the ground, he sees Yoshi suddenly reverse in motion and speech, going back to the point where Yoshi was before the jump. Femi retains the memory of what Yoshi said before jumping, but Yoshi, upon landing, does not remember what was said during the time in the air because for Yoshi, it didn't happen yet.

This results in a disjointed conversation where Femi might respond to things Yoshi no longer remembers saying after each jump. Yoshi, upon landing, continues the conversation from where Yoshi's time resumed, which is the moment before the jump. This could be confusing for both as they need to reconcile the out-of-sync experiences they each had during the jump. Femi could potentially inform Yoshi of the time reversal to avoid further confusion, but until that explanation happens, the conversation remains disrupted each time Yoshi jumps.