Was the ball still in play?
A close finish at the crease is easier to understand when you separate the questions. Begin with whether the ball was still in play. Then identify which wicket was broken and which batter's ground belongs at that end. Being somewhere near the crease, by itself, does not settle a run-out decision.
What was grounded, and when?
The basic ground test asks whether part of the batter's body or bat was grounded behind the popping crease. A bat hovering above the safe side is different from a grounded bat. There is also a protection for a batter who has made their ground while running or diving forwards and then loses contact as that forward motion continues. A later airborne frame alone can therefore give a misleading impression.
Was the wicket fairly broken?
The ball's arrival and the lawful breaking of the wicket matter, not simply the fielder's celebration. The run-out Law includes exceptions, and a no-ball is not a blanket guarantee against a run-out. Stumping is a separate dismissal with its own conditions. These details are why a freeze-frame of a foot and a white line is not a complete legal analysis.
Use replays to ask better questions
For a hypothetical practice incident, follow the ball and both batters through the whole sequence before looking at the decisive instant. Avoid naming a real player or inventing a match result to make the example exciting. Official umpires apply the relevant Laws and competition procedures. This beginner checklist helps viewers understand those decisions; it does not replace the officials or claim access to an official replay feed.
Factual references
MCC official source 1 ↗Original explanatory writing. No official text, images, video or live-score feed is reproduced. References do not imply endorsement.