Donkey Kong (SSBM)/Back aerial
DK does a midair kick behind him, which has Sex kick properties. One of DK's best moves due to its long range and decent speed and knockback. It is also quite safe on shield, both when SHFFLd (which makes it +/- 0 on block), and when spaced. The weaker hit is an occasionally useful combo extender which can allow DK to followup with another aerial. It can combo from up throw against most midfallers and fastfallers, and has reasonable kill potential past 100%. An all around good aerial that's a staple of DK's play.
Due to the fact that DK's hitboxes facing forwards are generally a lot less useful than this move, DK players will often use his neutral special to turnaround before putting out an aerial; with good timing, it is possible to do this and land a back aerial within a shorthop.