Usain Bolt, the greatest sprinter of all time, returned his 4x100m relay gold medal from 2008 Beijing Olympics after his teammate Nesta Carter was found guilty of doping.

Bolt is not happy and says “it’s just one of those things that happen in life.”

The entire Jamaican relay team, Bolt, Carter, Asafa Powell and Michael Frater, had to return their gold medals after Carter was found in re-tests of his sample to have taken the banned stimulant methylhexaneamine. All of them surrendered their medals on Friday.

Bolt had won gold in the 100m, 200m and the 4x100m at Beijing and repeated the unprecedented feat in London in 2012 and again in Rio in 2016 (triple-triple). The loss of 4x100m medal leaves Bolt with eight Olympics gold and he still might have one last chance to reclaim his medal, with an appeal by Carter to the Court of Arbitration for Sport (CAS) in the works.

Bolt(30) will retire after the 2017 world championship in London.