One day, Lightning Dust was moping on a could until a kart suddenly came out of nowhere from above. It bearly missed her.

One day, Polar was kart racing and in first place. But suddenly a time warp came out of nowhere, and it malfunctions too. Now he's in a strange Pony obsessed dimension on top of a cloud having bearly missed landing on a Pegasus.

Fourth in a pseudo one-shot series I like to call: Slightly Random Pony and Even More Random Game Character. Or SRPEMRGC or Pony and VGC for short. Where every character will be treated with respect, unless that goes against the characters existence/purpose. They won't have an overarching plot, each story can be enjoyed on its own. They take place in the same universe though.
1: Rainbow, Big and Froggy
2: Princess Twilight and Dr. Nefarious
3: Applejack and Moneybags
4: Lightning Dust and Polar