I'm not even going to bother trying to figure out the timeline, since, as we're all well aware by this point in the season, everything is happening ridiculously fast. Let's say that Gendry is an extremely fast runner and is able to make it back to Eastwatch in a few hours — how does Jon even know that Gendry is the fastest runner in the group to begin with? Pretty much all he knows about Gendry other than his parentage is that he's a "good fighter." Jon has also only known him for . . . what? A few days? A few weeks, at most? Has Gendry been sprinting around Dragonstone all this time like Usain Bolt?
