A pilot I knw was flying with a WSO known to be a bit low on the SA side. During an aircraft emergency, the WSO kept trying to run the wrong checklist. Finally, the pilot reached over, grabbed the WSO's oxygen mask hose, and shook the dude's noggin back & forth while shouting "Shut the F up!"
It worked, and may be the ONLY good thing about side by side seating.
But when it came time to use a piddle pack? Not good at all...
Ha! Same thing happened while I was going through pilot training with a guy in my class and his brand new instructor in the T-37. The instructor grabbed his O2 hose and shook it, and the student grabbed the instructor and shook him. They had a little stand down in the air and decided to come home. After much counseling for both, they worked out their differences and actually became good friends.