Spain's Princess Leonor had her historic military debut - leading a military parade for the first time as the future commander-in-chief. But the ceremony, conceived as a flawless demonstration of state power and continuity, was marked by two things no protocol can control: a mechanical glitch and the weather.

During the ceremony, one of the flags got stuck and didn't rise as planned, while rain disrupted the air program. The symbol of the state, at the moment it was supposed to fly proudly, stayed stuck - an image that inevitably invites interpretations, even though the real cause was entirely prosaic: mechanics.

Princess Leonor, heir to the Spanish throne, is going through intensive military training as part of the preparation for her future role as commander-in-chief of the armed forces. This parade was one of the key moments in that preparation - a public confirmation that the monarchy is passing to the next generation.

Although the stuck flag and the rain dominated the headlines, they are in the end trivialities next to the meaning of the event. Monarchies live off symbolism and continuity, and Leonor represents the future of the Spanish crown. One stuck mechanism doesn't change the trajectory of an institution that's centuries old.

But there's something human, almost poetic, in moments like these. However much ceremonies are planned down to the smallest detail, there's always something that slips out of control - a flag that won't rise, a cloud that lets the rain down at the wrong moment. Sometimes even symbols are a reminder that not even the most powerful institutions can control everything a day brings.