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He is boasting about his muscles while flexing and talking how strong he is.
Fer gets annoyed and hits with a low blow from behind.
Tony is in pain now holding his groin region with both hands.
Tony tries to fight back, but in vain! Fer grabs him by balls and crush them! Now Tony is on his knees holding his balls in pain! Fer pull him up by hair and push against a wall  Then Fer crushes his balls again while he is pressed against wall. Fer now asks Tony "who's strong now eh?" Tony tries to fight back again. And this time he is successful to bring Fer to his knees after a small fight. Tony became complacent again and start flexing his biceps while holding Fer by his hair. Fer spots the chance and grabs Tony's balls and starts crushing them while getting up from kneeling position. Tony looks helpless in pain, holding Fer's hands,face upwards and eyes closed as a reaction to pain. Fer has an evil laugh this time and does a bully talk to Tony. Tony begs to stop. Fer leaves him.  Tony is lying on the ground now holding his balls. Fer lifts Tony's leg up and spread them wide and drop a knee to Tony's balls. Tony is in pain. Fer repeats this twice. Tony is in pain everytime. Tony is still lying on ground in pain. Fer teases him by asking "tell me who's strong now huh?" 2-3 times. Every time he asks him, he slaps him in balls. Tony groans in pain everytime he slaps him. Fer stands up, gives Tony hand to get up. Tony tried standing up while in pain.  This happens 2-3 times. Tony is on his knees holding his balls by both hands. Slowly he gets up and starts apologising to Fer. Fer gives an evil smile, quickly drops to his knees and delivers a low blow to Tony. After a brief reaction, Tony crashes to the ground. Fer crushes his balls with his feet to finish him!