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
*Getting impatient* Oh God! They're so slow! I just wish this game could handle fantasy! *Teleports into tank with no one in it* They left didn't they. *Annoyed expression*
Questioning the plan? Tell that to the other bank. We screwed up the robbery on that other bank in only one page thanks to people not following the plan.
To Mexico we go! Let's drive to the airport! *Grabs steering wheel and drives to airport* *Looks in rear view mirror* Guys! We're being chased by the police! Deal with them quick! And don't harm any civilians!