Mary Magdalene went to the tomb weeping, and in the deepest distress.  She found the tomb empty, which compounded her sorrow.  She turned to the gardener(as she supposed) who was standing there, and asked where Jesus' body was.  Jesus said, "Mary."  Suddenly recognizing Him, her utmost sorrow was replaced by unspeakable joy in an instant.

Alma, while in a coma, was harrowed up by his many sins, and suffered the most exquisite pains.  (Alma 36).  He remembered his father teaching of Jesus Christ, His Atonement, and the need for repentance.  He cried out to the Lord for mercy, and immediately his pains were replaced by the most exquisite joy.  It happened in an instant.

Rick Stephens was snowmobiling up Rock Creek last January having an exhilarating adventure when he was suddenly caught in an avalanche and buried under five feet of tightly-packed snow.  In an instant he found himself in another world where he was unprepared to be.

The resurrection will be like that.  Jesus and Paul both said that it will happen "in a moment, in the twinkling of an eye."  (3 Nephi 28:8, 1 Cor. 15:52).

Adonijah exalted himself, gathered a following, set up a grand banquet, and prepared to be crowned king.  (1 Kings 1).  As he and his guests finished eating, they heard trumpets and pipes and a great uproar in the city.  A young man came in and announced that Solomon had just been crowned king.  "And all the guests that were with Adonijah were afraid, and rose up, and went every man his way."  (1 Kings 1:49).  Adonijah was left alone.  In an instant he went from basking in his own glory to being in terror of his life.

Sennacherib, king of Assyria, besieged Jerusalem.  The prophet Isaiah told king Hezekiah not to worry.  "And it came to pass that night, that the angel of the Lord went out, and smote in the camp of the Assyrians an hundred fourscore and five thousand:  and when they arose early in the morning, behold, they were all dead corpses."  (2 Kings 19:35).  Sennacherib went home, where his sons killed him.

On Easter Sunday 2020, 80 tornadoes ravaged the southern United States.  One man was listening to the weather channel which was announcing a tornado watch.  He looked out his window and saw a funnel.  He and his wife had just purchased their home a few weeks previously.  A selling point to them was the "concrete safe room" which doubled as a closet.  The family, which included a 2-year-old and a 6-month-old baby, dashed into the safe room.  Twenty seconds later the tornado hit the house.  When the family emerged, the safe room was all that was left of their home.

"Watch, therefore, that ye may be ready," Doctrine and Covenants 50:46 says.

"Therefore be ye also ready, for in such an hour as ye think not, the Son of Man cometh."  (Joseph Smith-Matthew 1:48).

"Watch, therefore, for ye know neither the day nor the hour wherein the Son of man cometh."  (Matthew 25:13).

"Watch ye therefore, and pray always; that ye may be accounted worthy to escape all these things that shall come to pass, and to stand before the Son of man."  (Luke 21:36).

Tides turn.  Things can change in an instant.