Talk about thinking outside the square! Both good ideas, but I think Gareth's will work better for me. There actually is a quiet drop and get. Use : drop quiet = "true" ; and : get quiet = "true" ; , then you can give your custom response.
I was actually using the chasm as an example. In my case, I'm up a tree and the only thing I can get while up the tree is an apple, so I can just test for "drop apple" and create the apple at the bottom of the tree. Apparently, this moves the apple from its current location in order to create it at the new location. Hopefully, this doesn't mess up the count of things in your inventory.
In case you can't tell, this is the first time I've used Adventuron (only started yesterday) and it's proving to be quite a challenge. I'm putting this down to ignorance on my part. My previous adventure writing experience is primarily BASIC and Inform 6, where you can do pretty much anything you like. I was never exposed to The Quill, PAW and GAC, except as a player.