My son pulled off one of these flawlessly about three seasons back, but the only provision on the sky kick is that it had to either touch a player after the minimum 10-yard travel or had to touch the ground before the kicking team could touch the ball. Unfortunately for my son's team, the gunner on the opposite side of the field got overly excited and jumped up and plucked the ball out of the air, after it had traveled about 12 yards, but before it touched a receiving player or the ground. Result was receiving team possession and a costly 15-yard penalty tacked on.
Absolutely love them, but might be biased a bit as my son was a kicker. Loved the opportunities on both side of the ball to swing momentum in a lightening strike. Whether it was a receiving team taking it back to the house, watching a well-placed kick that helped pin a receiving team on the sideline, or the kicking team executing a perfect onside kick ... including seeing a kicker recover his own onside kick, by design.