http://www.forgehub.com/forum/halo-forge-discussion/22831-forge-tutorial-master-index.html Forge Master Tutorial Index...look for the switches part.
I don't know if this will be of help to you but http://www.forgehub.com/forum/halo-forge-discussion/20583-java9script9s-guide-traps.html these are just a few examples and as said above switches make great traps.....
Example: o = custom power up || [] = dumpster || -- = Walls || / = man cannon || ---- o[]/ ---- So the dumpster is being held by a custom power up, active camo *wouldn't recommend using a overshield though.* once the person touches that, the dumpster will be spit out fast and wtfbbqsaucewhysoseriousown them .
put a grv lift on a weapon holder bhind a door pushing into fusion coils where you can put a trip mine