superhuman

bizarre, curious, eerie (also eery), far-out, grotesque, outlandish, out-of-the-way, outrageous, outré, peculiar, quaint, queer, quirky, screwy, strange, wacky (also whacky), way-out, weird, wild

baffling, bewildering, confounding, mystifying, perplexing, puzzling, shocking

aberrant, atypical, fantastic (also fantastical), flaky, freak, freakish, idiosyncratic, marvelous (or marvellous), prodigious, rare, singular, uncommon, unique, unnatural, unusual