Well, this is more like getting the Switch paramater to work, but having both an off and an on switch for the same trigger.
Multiple pickups in the same spot (like, you grab one lemon and have an instant sugar rush)
Pickups and scenery
Trigger scenery and trigger Zone (diffrent ID's)
Warps and pickups
Have a carrot in the center of four spinning spikeballs... all on the same tile.