Somewhat experienced vehicle players might be familiar with the thing when, instead of fighting another heavy vehicle in your APC/tank, you bail out of the vehicle (which is done instantly, btw) and use your tandem RPG to kill the enemy vehicle MUCH faster than you would if you kept using your vehicle.
This is a ridiculous game mechanic that I have never seen in any other game. It's not even something like rendezook, because it barely requires any skill or luck to pull off.
There's a lot of reasons why it's possible (such as RPGs having no arming distance, tandem being super quick to pull out for how strong it is, tandem having AoE for no reason, the pathetic damage of vehicles, the low accuracy of APC cannon, no damage for jumping out of a vehicle at full speed, etc.). However, this particular problem could be easily fixed (without touching any other aspects of the game) by changing the bail-out time to 3-2 seconds for vehicles like APCs and tanks, and during these 3 seconds, you would not be able to control your vehicle. This change would be realistic, balanced, and it would actually make sense.