In the hotel room when Patrick sets the TV on the edge of the bathtub, the cord is pulled tight and he has to step over it to get to the side of the tub. When he leaves to go get ice (and also when he returns afterwards) he walks straight out of the room as if the TV's cord isn't there at all.
While in the restaurant in New York in 1982, Patrick asks for a quarter for the telephone. Beginning in 1951, the cost to make local calls on pay phones in New York was 10 cents and did not increase to 25 cents until June 1984. The cost was so well-known it led to the slang expression "dropping a dime" in reference to calling the police.