The game is very similar to this except it's impossible to do it all in 90 seconds here.
Rules are simple: starting person makes a scenario and starts a sentence with a letter. The next person starts another sentence with the next letter, the person after that does the same and so on. When we eventually reach the starting letter, the person who hit that letter creates a new scenario, picks a new letter, and it starts over.
Example: (starting letter = B, scenario = the office building's on fire) Person 1: "Bring me this month's financial reports." Person 2: "Can't you see the building's on fire?" Person 3: "Does it matter?" Person 4: "Everyone else is evacuating."
Ok now it starts Scenario = You're on the Titanic when it crashes into the iceberg; Starting letter = J
Why shoot them? They have done nothing wrong. WHAT KIND OF SICK TWISTED MIND DO YOU PLAY HERE! They are zombies who eat flower. The ugly ones, not the beautiful.
(You're supposed to follow with the next letter in the alphabet) Far out! Wake up you two! There are no zombies and we're still trying to figure out how to infiltrate the citadel to stop the Midnight Sun.