"Excellent. Call out the distance every couple of feet, please," Ignis is forced to pause for a moment as he hears the sound of a shark coming up on his left side. Without missing a beat, he whirls on the beast, blades shattering out the fin as they had before.

As he reorients himself to begin running again, the young man will probably notice that Ignis' path is now not right toward him, but veering to the left as if he's not quite accurately judged how far over he moved to deal with the shark.

He just might be right about that blindness thing. Perhaps calling out a course correction would be helpful?