Slater still firing at 54 at Tahiti Pro, eliminating Medina: Kelly Slater may be retired from full-time surfing, but the GOAT shreds some big waves at the Tahiti Pro to beat Gabriel Medina – and his win sets up a showdown with an Aussie surfer. #KellySlater #TahitiPro #Surfing #Goat #BigWaves