The endurance hunting hypothesis is on the same pseudo-science grounds as the aquatic ape hypothesis. Humans evolved in rocky terrain, where it would have been very difficult to track animals. And there is concrete evidence against it too. In the one place where animal remains with evidence of being eaten have been discovered alongside early humans, the bones were mostly adult and fit animals in their prime, not young or old which would be the easiest to catch by endurance hunting.

More likely is that early humans were ambush hunters, waiting in the foliage for an unlucky animal to walk by. It's possible that there were groups of humans that used endurance hunting, possibly for sport rather than survival (this is what the only groups of people who practice it today do).

So cassini was tracking Dione, and titan "happened" to be in the background, that's pretty cool. I suppose the cassini team must have planned for this event to capture. I'm guessing most of the movement of titan shown here is actually movement of cassini, being close to Dione for that high res shot means a lot of parallax for far-away titan as cassini moves.