This smells like hokum to me much like the wolf sniffing the dogs ass. The pic indicates it is from tik tok so doesn't strike me as a peer reviewed test lol, likely some influencer grifter on the make
But if the nonsense premise is put aside momentarily, surely it would make more sense from a primal evolutionary sense that seeing the wolf first would indicate subconsiously being more acute to danger, in other words more prone to being prey and the flight type
The fact that robcguns, famed fighter not flighter, saw the rear end first would appear to back this up