I remember an incident in Red Orchestra where we were on a tank map. A teammate hopped in a tank. So, I did too. He jumped out of the tank and into another; so I joined. He jumped out and started shooting at me, basically insisting I get my own tank. Apparently, his level of tactical sense and reflexes in a tank vastly outweighed the value of having a second player in the gunner’s seat; even though the game was realistically meant to depict tank crews cooperating.