UnderGroundOnline has a Top 11 (one better than top 10?) adversaries of Arnold Schwarzenegger in all of his movies.
Here's #6. Johnny Cab (from Total Recall):
The film is set in 2084, and there have been some liberties taken with where society is headed. For instance, cab drivers have been replaced by robotic automatons called "Johnny Cabs" -- protocol wizards who make casual conversation and know directions to everywhere. Still, the taxi business is still a business, and Johnny Cab has an inbuilt defense against those who won't pay the fare. As Arnold finds out in his role as "Quaid," Johnny Cab will scream at the top of his lungs and crash his car into a brick wall if you offer an expletive instead of the usual tip.
http://www.ugo.com/channels/filmTv/features/eleven/adversariesofarnold/default.asp - via Eduyayo