The countdown and launch of a rocket, missile or spacecraft
A try (scoring play of grounding the ball in the opposing team's in-goal).
The moment when an aircraft or spacecraft makes first or final contact with the ground during a landing.
A defensive action of grounding the ball in the team's own in-goal to stop the play.
A six-point score occurring when the ball enters possession of a team's player in the opponent's end zone.
The moment of contact of a tornado with the ground.