Continuity mistake: When James Dean's mom writes out a check for $5000 and gives it to him, she licks the envelope first, but when she actually hands over the envelope to him, it's clearly not sealed.
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Suggested correction: I noticed this, too, but as it's all one shot, it's not a continuity error; it's simply that she didn't properly seal the envelope. Not a film mistake.
Continuity mistake: When Cal jumps on the train he wraps his sweater around himself to keep warm, covering his mouth, but in the nest shot with his voice over, the sweater is just wrapped around him up until his neck, with his mouth free.
