DOWN GOES TYSON!Barstool Viral12/29/2015 7:23 PMFacebook IconTwitter IconCopy LinkMoreComments15#hoverboard #knockout #MikeTysonBreaksBack #imtoooldforthisshit #cyboardA video posted by Mike Tyson (@miketyson) on Dec 29, 2015 at 10:35am PSTBarstool Viral12/29/2015 7:23 PMFacebook IconTwitter IconCopy LinkMoreComments15