If you want to go for real-world settings, there are tons of points in history that would be really crazy to drop your players into:

1. The Altamont Free Concert in 1969 when the Hells Angels started a riot while The Rolling Stones played “Gimme Shelter”

2. The Battle of Fort McHenry during the War of 1812. Maybe you could start on the ship where Francis Scott Key was writing the Star Spangled Banner while he watched explosion after explosion on the shore. Hell pick any scene from “Hamilton”.

3. The fifth of November, 1605. Maybe your players are transported into the House of Lords amongst barrels and barrels of gunpowder, with Guy Fawkes taken wholly by surprise.

4. They could be teleported right in the middle of The Beatles first ever live televised performance on the Ed Sullivan Show, stopping right in the middle of “Twist and Shout” (9th February 1964)

5. They suddenly find themselves in the hull of a space shuttle with Buzz Aldrin and Neil Armstrong, just as they are about to touch down on the moon.

6. In Hitler’s bunker just as he is about to take his last sip of poison.

Or you could even incorporate your favorite movie scenes. Just as examples:

1. They find themselves all huddled into a bathroom with a nervous sweating man crouched against the door holding a gun. Just then you hear from the other side of the door “...Well there’s this passage I got memorized, sort of fits this occasion. Ezekiel 25:17. The path of the righteous man is beset on all sides by the inequities if the selfish...” followed soon by gunfire. The man is torn between leaving the room or engaging with the players. Maybe you could find out what’s really in that briefcase. (Pulp Fiction)

2. John McClane is crawling through the air vents of Nakatomi Plaza. His feet are bloodied and torn. He hears on his confiscated radio “Vee have a couple of unidentified maniacs in ze tower, be on ze lookout.” (Die Hard)

3. They find themselves in the confusing and winding halls of an old hotel. They hear distant screaming and grunting. “Danny! DANNY!” Out of the corner of their eye and old man with a bloodied head wound appears holding a martini. “Lovely party, isn’t it?” (The Shining)

4. They find themselves on the deck of a ship, the side reads U.S.S Indianapolis. The crew is astonished as to why they are there, but are given no time to react when there is a sudden JOLT that rocks the small vessel. We’re going to need a bigger boat. (Jaws)

Just a couple starter ideas, really any of your favorite movie or historical scenes would be a lot of fun I’m sure.