Clearly the little kid in the hat was (a) feeling under-appreciated and wanted some attention, or (b) was indicating to the audience and the producers that he thought little of Back to the Future III and that people who felt otherwise knew what they could do. Either way this is one of the most blatant “why did they leave this in?” shots since the young kid in the cafeteria who plugged his ears before Eva Marie Saint shot Cary Grant in North by Northwest.