Player character can, for some obscure reason, jump again in mid-air once or more often (during "single" jump), reaching much higher or farther they normally would.
Name variations: double jump, triple jump, jumping
The first video game about Mid-air jumping was released in 1984.
* Rockets (jetpack, rocket boots, etc.)
* Wings, fins, or other appendages (only good for that single additional burst)
* Magic (summons a short-lived platform from which they jump, or something similar to the above)