1) Declined sharply 2) Did a full gainer 3) Did a gainer 4) Did a jackknife 5) Dropped sharply 6) Emulated David Boudia 7) Emulated louganis 8) Executed a gainer 9) Fell precipitately 10) Headed for the bottom 11) Jackknifed 12) Jumped in 13) Left the board 14) Made a splash 15) Plummeted 16) Plunged Found on https://www.crosswordclues.com/clue/dived