Martial arts was a big fad during my formative years. The comics and popular media were filled with it. The punches and flips were neat, but it was the kicks which set it apart, which made dynamic and dramatic and very cool covres. Above is a great "kick" cover, a beautiful rendering of the one and only Bruce Lee by Neal Adams for the debut issue of Deadly Hands of Kung-Fu.
Below is my favorite all-time movie kick, this one also by Bruce Lee.
And here are some more great comic kick covers.
And just for...well...kicks...here's the first "kick" comic book cover I remember, and it's also my fave. Neal Adams strikes again.