Our hearts we pledge to thee

For some reason I've had this song spinning round my head all day. The thing I don't get about it is, at the end why does the French mouse pull out Bianca's chair when she's about to sit down, just to push it back seconds later? It's almost as if he's debating whether to punish her for being late by making a timed sweep of the chair, disguising his true motive for French chivalry.

I can't help but wonder what kind of film it would have been had he succeeded....