We also see that he's not exactly a green mist when he's "The Green Mist"; he's actually invisible.
We also learn that John smokes (boo!), but looks really slick in a suit. I sure like this look more than the nearly naked look they'd give him in the comics later.
Let's assume that John either stole synchronization gear for his front-mounted machine gun (which the narrator neglected to mention) or, being really smart, he was able to improvise one (which makes me wonder -- could inventing things become a skill check?).
This is something I've gone back and forth on about vehicular combat. How would the Editor know when to have bullets make a plane burst into flame? It seems that there has to be a chance of a random complication per hit.
Parachuting is a potentially dangerous business. Should it grant a saving throw to avoid falling damage, rather than automatically spare the hero from falling damage?
It's unusual to see characters actually speaking in German, instead of German accents.
Speaking of unusual, this is an unusual variation of the "take me to your leader" tactic.
It's hard to believe John somehow forgot to prepare his most potent power before landing himself in Germany, but players do this sort of thing all the time when they're playing games where they have to prepare their characters' powers, spells, or what have you.
Here we see John demonstrating wrecking things and the Leap I power. He describes his powers as "the strength of a hundred men," (that means he can lift 5-10 tons, or the equivalent of the Raise Trolley Car power), "the brains of a hundred scientists" (I have no idea how to quantify that one in game terms), and "the physical alertness of a hundred antelope" -- and I'm not even sure what that last one means! Should being immune to surprise be a power?
It's interesting that both the German and the French forces are wearing gas masks. Apparently they are both expecting chemical attacks from each other? John grabs a rifle, but doesn't bother with a gas mask. He is apparently very confident about his saving throws vs. poison, which makes it odd that he even feels he needs the gun. Perhaps the rifle, like the uniform, are just for identification.
The ability to wreck tanks means that John is at least 4th level. If he has access to 4th level powers, though, then we know he's at least 6th level.
Normally, attacking while invisible dispels that invisibility. One could make a case that wrecking things is not, technically, an attack.
As a reminder of how ruthless Amazing Man can be, he killed the pilot before commandeering the bomber. Granted, it was a Nazi pilot.