Continuity Error! *spoiler*
Wow, haven't seen such a continuity error since the film "Seven Pounds"!
Halfway through the film, we see Edward preparing to die from his cancer. Carter seems to be in remission. A few scenes later, Edward is fine and Carter is suddenly ill again with no explanation.
I'd say this cloud is Cumulo Nimbus.
Didn't he discover America?
Penfold, shush.