I love the headcanon that Cybertronians flare their armour when feeling angry or threatened, but it doesn’t make much practical sense - surely raising it away from their protoform leaves them vulnerable to attack?
so may I suggest that Cybertronian threat displays have two phases: the armour-flaring intimidation phase, followed by the actively threatening I'm-literally-about-to-attack-you-now phase where all their armour clamps down at once. It's loud, unmistakable, and a clear sign that shit's about to get violent if you don't back off
i just think it would be dramatic :p

















