Hints for when to say your good byes to the host early.

Beer cans and other debris like ashtrays are flying about
I'm pretty sure that personal injury and or incarceration will ensue.

men in blue uniform wearing guns want to join the party.
I'm pretty sure that personal injury and or incarceration will ensue.

The land lord or owners of the hosts party house want to join the party.
I'm pretty sure that personal injury and or incarceration will ensue.

The intoxicating beverages/substances run out
I'm pretty sure that property damage and incarceration will ensue.

You start to see double.
I'm pretty sure that personal injury including property damage followed by incarceration will ensue.

Someone falls through the glass top coffee table or thows up on the cat.
Property damage has already occurred. Besides it's a lame party. Bolt.