Roman legionary feats of fitness

[Gladius Hispaniensis]

No, it wasn't a legionary, it was a cavalryman named Pedanius.
After an attack against the roman fortification around Jerusalem, he pursued the fleeing aggressors and snatched a strong and well armed young man.
From his galloping horse he had down-bent so deep to grip the foot ankle!!

S AUFIDIUS, there were two separate incidents, one involving the cavalryman Pedanius outside Jerusalem and another one involving a legionary named Rufus. In the latter case he nabbed one of the leaders of the revolt, not just a rank and file person. I'm pretty sure I read both incidents in Josephus.