J.L.
FYI Geebers is talking about Mickey's Halloween Treat which is in California at Disneyland. I have been to that one and we had an amazing time. The one at Disneyworld is a little bit different and I have not been. What I do know is that the characters are dressed up for halloween and you can see lots of villans around. There is a special firework show and a special parade that are exclusive to the event. As far as I know those shows are different to each coast as well. The park is more halloween looking more festive and they add lighting effects. Also tickets are more limited than during the day so there are less crowds.