noun [feeling] [with obj. ]
the inhibition, the adrenaline, the sudden explosion, the release, the essence, the spasm, the emotion, the fear, the love.
ORIGIN Hugo is a surname and male given name of Germanic origin Hugo, meaning "Bright in Mind and Spirit" or "intelligence".  The English version of the name is Hugh, the Italian version is Ugo.
It's all about accumulated energy exploding at a certain point. The vulcan eruption, the tennis ball hit from the player potential energy which accumulates what is it, where is it, before it can express itself and its own extension?
The unpredictable trajectories of eruptions and lava, the hits of the tennis player. Unpredictable geometries.
Still predictable, and then suddenly out of control. The red earth of the tennis field, the lava of the vulcano. The flaming red of both.