How much would you give

 A driver is stuck in a traffic jam going into downtown Chicago. 
Nothing is moving north or south (never does). Suddenly a man knocks on 
his  window. The driver rolls down his window and asks, "What happened, what's 
the  hold up?" 

"Terrorists have kidnapped Hillary Clinton, Rosie O'Donnell, Jesse  Jackson, and Al Sharpton.

They are asking for a $10 million  ransom.  Otherwise, they are going to douse them with gasoline

and set  them  on  fire.

We are going from car to car, taking up a collection." 
The driver asks, "On average, how much is everyone giving?" 

"About a gallon."