Atletico Madrid striker Diego Costa is well known for his fiery temperament on the pitch, but it seems his unpredictable behaviour has spread to training.
A video released this week shows Costa training with his fellow teammates when he spies a child playing nearby - obviously, his first thought is to walk over and trip the kid over.
Brazil and Spain have been taking part in a public tug o' war over the 25-year-old's international allegiances, but the furore doesn't seem to have affected him that much by the looks of it.
Costa doesn't think twice about humiliating the kid and going back to training, but he probably wasn't expecting his victim, who looks like he couldn't more then ten, to respond by flipping the bird!
GMS were delighted the boy responded with the finger and doubt many children his age in that situation would have done similar - Costa also found it quite amusing.
Watch Diego Costa trip up a kid at training and the boy give him the finger above...
(Thanks to 101GreatGoals for bringing it to our attention)