Jigglypuff (SSB4)/Neutral aerial
Jigglypuff kicks its foot forward and holds its foot out, damaging opponents. The move is considered one of Jigglypuff's best aerials, due to possessing several useful properties. Firstly, it is Jigglypuff's fastest aerial on startup, with the hitbox first becoming active on frame 6. It is a sex kick, with the hitbox lasting for a total of 25 frames, which when combined with its well positioned hitbox and Jigglypuff's exceptional air mobility makes it a powerful edgeguarding and gimping tool. Additionally, the move deals 11% damage for the clean hit, with impressive KO power for a sex kick move (although it has slightly above average startup for a sex kick to partly compensate). Finally, Jigglypuff flattens itself somewhat while the hitbox is active, narrowing its hurtbox of the duration of the move. As a result of these strengths, it is a highly valuable tool for Jigglypuff.
It does, however, have some drawbacks. As mentioned above, it has above average startup for a sex kick, with most sex kicks clean hits being active on frame 3 or 4. Additionally, it has 15 frames of landing lag, which is also on the upper end of the spectrum for sex kicks. Finally it still suffers from the general drawbacks that sex kicks tend to possess, most notably subpar range and a long total duration. Overall however, the move's combination of speed, power and lingering hitbox, along with Jigglypuff's air mobility make it a very useful move in Jigglypuff's moveset. It is sometimes used as a wall of pain finisher.