It is often claimed that many basketball players would be more successful shooting free-throws underhanded but choose not to do so for fear of being made fun of. (A famous example of this is Wilt Chamberlain, who thought doing "granny" shots made him look silly, even though when he did use them his normally poor free throw percentage shot up.)
Are there other examples where athletes in a sport don't use possibly better techniques for fear of looking silly?