A cherry hitting Caesar in the head probably would not have knocked him out.
When the firemen come in the close up shot of Arnold, his sleeves are short instead of long.
In the dream sequence with the gang in the future, Sid is shown to be larger than Rhonda and Helga. Sid was most likely meant to be in the foreground which may explain why he is huge.
Arnold tells chocolate boy to go to the fire station, but Arnold neither tells Harold to nor think up in the 1st place to go to fire station.
