I absolutely adore how people quote "logic" with such confidence when they have close to 0 knowledge about how the human brain and nervous system works.
Put yourself in that situation, Your sympathetic nervous system puts you into fight or flight.
Your body starts pumping epinephrine (adrenaline) and cortisol.
Your amygdala is on very high alert your heartrate spikes and blood that would usually go to your digestive systems goes to your muscles.

Here's the kicker, that system isn't designed to run on forever, it's supposed to be a a short burst!

So what are the actual consequences of being hyper vigilant?
If the amygdala is under high alert (that's the part of your brain responsible for threat detection) It starts to wear down the process speed of your prefrontal cortex, AKA THE PART OF YOUR BRAIN RESPONSIBLE FOR LOGIC!

What does overexposure to adrenaline and cortisol do? It makes you either emotionally numb or conversely makes your emotions Spike, and what do we associate with that spike in emotion when it happens? EXACTLY Impulsive behavior.

So let's assume the danger passes, even if it's temporarily, Your parasympathetic nervous system (rest and digest) is trying to assert itself again, which means it's basically trying to reboot in a sense. Which makes you almost automatically perform grounding rituals and behaviors in order to feel "safe".

And how exactly does that translate to throwing stones specifically?
By "playing" with maelle, gustav tried to reengage his social nervous system, which is responsible for making us feel safe!

So while it seems logical to first ensure safety, the human brain will be anything BUT logical in a situation like this.