Um, have you ever heard of a gen named Patton? Served a bit in EU theatre. Was investigated for abusing an EM and was forced to issue a public apology. He did 'ok' in his war effort.
As for the gen on the AF plane, sit down when told. If there's turbulence, and it's going to toss the meatsacks around, if the gen isn't in his seat with a belt on, the loadmaster, or the AF equiv of a flight attendant might be in serious trouble. I would have told him to sit and buckle too.
Now, my tangle with a 2 star when I was just a SP-5: I was a pro race driver at a small time track for a few years. Stationed in W Germany for a while, I got a Spezial Reisepass for the Nurburgring F1 race, as a sponsor got me one. I think it was Rothman cigs maybe. Anyway, I"m up in the suite with free drinks, and food, and rubbing elbows with some big name sponsors and the like. A 2 star comes in with a Col in tow. He can tell from my haircut and English I'm a soldier. The O6 takes me aside and asks for my mil ID, and I give it to him. He looks it over and looks me over and tells me to leave. Well, no I don't think so sir, have a nice day sir, please can I have my ID sir, thank you sir good day.
Natch, the two star didn't like this so he came over to me and asked WTF are you doing here, and I said I was invited. He wanted to see my invite, and I showed him. I asked for his, and he didn't have one. Our host sponsor made him leave the suite. I think the two officers were so embarrassed they never said anything to anyone about it. I left the army soon after that. But - Gen can be very pleasant, or very unpleasant.