Cesc Fabregas may no longer be a Chelsea player, but he has aimed a parting shot to former teammate Alvaro Morata that may have kicked off 2019's first social media craze.
If you are one of the many people who are trying to cut meat and dairy out of your diet for "Veganuary," or just bristle at the sight of food being wasted, best look away now.
At some point during a standard day at training, Morata obviously took Fabregas aside and told him about his theory that an egg won't break if it lands on grass, no matter how far or high you throw it.
This led to Fabregas -- who joined Monaco last week -- openly mocking his Spanish cohort on Instagram while singularly disproving the Egg Theory.
However, Morata refused to let it lie and, along with his wife, Alice Campello, proceeded to send Fabregas several videos of their theory in action.
Standing on his veranda at home, the striker hurls three eggs onto his lawn without any of them breaking.
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Lo siento @cescf4bregas si pones tu vídeo trucado de la ciudad deportiva en un campo duro y mitad de hierba artificial tienes que explicar que no tuviste 🥚 🥚 para venir a casa y probarlo en césped 💯 natural! Menos mal que hay testigos... aquí está mi prueba @zappacosta @cescf4bregas #eggchallenge
"Cesc, I'm sorry if you put a trick on a hard pitch in the training ground with half artificial grass," Morata wrote in the accompanying caption, with teammate Davide Zappacosta on hand to adjudicate.
"Come to my home and try it on natural grass! Thank God there are witnesses. Here is my proof."
Campello then followed up by sharing several of her own videos, in which she began by taking fresh eggs from the fridge to disprove Fabregas' conspiracy that she and Morata were using hard-boiled.
"Hard boiled? I will show you that it's not like that. One second, I'll show you," Campello says as she takes one out of the fridge.
She proceeds to throw the egg down at the ground only for none of them so much as crack.
"Look, I'm even throwing it down hard.
"Now, I'm going to take the same egg to somewhere that isn't grass and let's see if it breaks. We'll identify it with this [points to dark marking on egg,] okay?
"Okay, it's still the same egg: now I'll try to break it here..."
She then throws the same marked egg onto the concrete path at which point it predictably bursts open with a yolky, yellow splat, before recreating her husband's own experiment.
With her theory proven (well, sort of), Alice rounds off the post by jokingly admitting that the gardener was watching her the whole time and now thinks she is a psychopath.
Given the evidence presented here, he might not be entirely wrong.