Your bicep is a lot more impressive than mine was at your age. Good job. Just out of curiosity, is your bicep as hard as it looks? It looks like a rock.
Weak ...
update flexing video please
Fantastic. How about an updated video?
Dude wenever i flex like that it hurts i hav to leave my arm open wen i flex
STOP THIS NONSENSE
HEY MARK WHATS UP BUDDY HOPE YOU DONT MIND IF I SHOW THIS TO EVERYONE AT SCHOOL. K BYE BUD
HUGE !
meeeeeeggaaaaaaa!!!!!!!!!!!!!!!!!
uhly
Gay gay gay gay and more gay
my dog looks just like that!!
Never seen a 13yo with as big of biceps as yours! Insane bicep peaks! Arm wrestling u would be a big mistake. U would kick my ass. Are u still 5 4 and are your arms still 15 inches? How much do you weigh?