Which states are you able to press Z to catch an item?

I know it is possible to catch an item by pressing Z while standing still and while in the air. I am guessing it is probably also possible while running. I'm wondering if it is also possible while performing moves, or perhaps in other states like hanging on the ledge. Are there any obscure states your character can be in where you can still catch items by pressing Z?

Here is a list of all the possible states a character can be in: http://smashboards.com/threads/list-of-all-possible-character-states-ie-downdamage-downwait.400270/