Continuity mistake: When Jiminy Cricket (The Ghost of Christmas Past) jumps on to Scrooge's bedside table, the time on the alarm clock reads 2:00. In the next shot, when the curtains move and Scrooge hears the dinging, the time reads 1:00, and when we return to Jiminy Cricket in the next shot, the time reads 2:00.
Scrooge: An-and that shy lad in the corner, that's me.
Ghost of Christmas Past: Yes, that was before you became a miserable miser, consumed by greed.
Scrooge: Well, nobody's perfect. And there-there's lovely Isabelle.