I guess you are supposed to punch the guy. The word "action," I believe, signifies this:
To use the inventory: Select the inventory square at top right of the screen. Select an item from the icons on the column and then select the action you want at left column. The actions available are examine (eye), take (hand) and combine (+).
If you look up at the top right of the screen, is there an action available that would signify what you are supposed to be doing here, perhaps with usage of the hand?
Sorry this is so vague - I am not familiar with the interface of this game.
We have some Cognition players here, though, so if what I posted doesn't help, someone else should be able to.