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
Just hold on a sec while I think about it... *Quickly uses Gunblade to shoot invalid777 in the heart before using it to slice Lucas head off* By the way you saw nothing. *Fires homing missiles with the Gunblade at the rest of the party*
Listen, guys, aren't we supposed to be saving that dragon? Kill each other before we make it back to our lands isn't exactly meaningful is it? Oh, and WHERE THE HECK IS THE STUPID DRAGON?
