Corrected entry: The 'Gas Man' thinks Harry and Lloyd know who he is because of the notice they left at the door of their apartment which was directed towards the gas man. But he still thinks it's a good idea to hitch a ride on their van. For a guy who thinks Harry and Lloyd have been following him around for weeks, it's not such a good idea.
Spaceboy_007
13th Feb 2005
Correction: Still, it was a human decision that anybody could have made. Does not classify as a movie mistake.
Spaceboy_007