Fighting on the pizza map, one of those coastal air brawls between two close fields. I'm in an F4F with three kills to my name, limping home on half a wing and no ammo. I think I make it clear of bad guys when, out of no where, a P-51 appears. He saddles up on my six, closing fairly fast, but all he does is pull up to my high 3 o'clock, rock his wings, and zoom away. I'll always remember that, and I've been chivalrous in situations that allow for it, ever since.
There's that, and the A9 raid with the 91st bomb group. A grueling marathon of 262s and other fighters attacking 10 sets of 17s at high altitude. Non stop action for more than 30 minutes with as many as seven 262s in range at a time. If I have time I'll try to find the film from it.