The experiment--part of a that Ross hopes to recreate--fails, and the exposure to gamma radiation causes Banner to transform into the Hulk for brief periods of time, whenever his heart rate rises above 200.
The experiment--part of a that Ross hopes to recreate--fails and exposes Banner to huge amounts of gamma radiation. This has the effect of causing Banner to transform into the Hulk for brief periods of time, whenever his heart rate rises above 200.