8. Greg Louganis Triumphs After Whacking His Noggin (Seoul 1988)
It's difficult enough competing in an Olympic diving competition as it is. But what if you add a concussion and four temporary sutures (later replaced with five mattress stitches) to the mix, after thumping your head on a diving board? That's the exact handicap that Greg Louganis overcame in the 1988 Seoul Olympics during the preliminary rounds, before going on to take the gold in two categories – the 3m springboard and 10m platform (matching exactly what he accomplished at the 1984 Los Angeles Games).