I know they can do that now, just not sure if that's what they did.
He's credited with securing the ball at the 7 (hence 93 official yards on the return). Looks like he picked it up just inside the 10, but whatever. If we start at the 7, he then drifts back to the 3 while traversing the entire width of the field (50 yards).
Granted, he didn't run at perfect right angles to the field so there's some trig involved, but it just seems like that even if we only count when he had the ball in his hands that he ran closer to 150 yards.