I need some Halo 3 Forge ideas?

[Enxiled]

I cant think of hardly anything to do on Halo 3 anymore. My connection is bad so I have alot of problems playing on matchmaking and campaign on LIVE. So, i decided to start building forge maps to show to my friends. I was wondering if any1 could give me an idea to forge on halo 3?
GT - Enxiled

 

[Tyler]

You should build a man cannon where you could throw a cone in and it would kill the person on the other side. if you did that you would have to add me on x-box live, gamer tag: Tyler J97