Stuck in an elevator together.

Going into a haunted house together.

Running into each other in the rain and getting soaked.

One person saves another from getting hit by a car.

Sharing a textbook and writing notes in the corners.

Waiting for a delayed flight at 2 AM.

Kisses them as a distraction to steal their wallet.

Working in a haunted house together.

One goes into a coma and wakes up when the other one dies.

Carving pumpkins together.

Two people are in a play/show/movie of some sort. They get sent the script by their writer to revise. While drunk, they delete practically the entire script, leaving a comment that says "it looks a lot better this way <3".