I often look for event ideas which are out of the ordinary and out of the box. I learned that Youtube is truly a good resource for this kind of tips. All you need to do is browse through Youtube and perform a search for "event suggestions" and you will find many hours worth of movies with many different very good tips. The problem is, who has the amount of time to watch them all? Thus I am on a regular quest to collect some details in order to save me and also hopefully others some time.
Here is a great video with some insane party ideas - https://www.youtube.com/watch?v=wUlJSgYGmFw
I hope you see a number of good ideas for your future occasion on Youtube!