The dialogue between Tony Stark and Bruce Banner has always been a science-filled aspect of the MCU. Sometimes, the lines would get so complicated that Robert Downey Jr. and Mark Ruffalo didn't always understand what they meant.
Robert Downey Jr. and Mark Ruffalo Didn't Always Understand Their Marvel Movie Lines
Downey and Ruffalo didn't know what they were saying but knew its importance to their characters.
