Consider the following scenario. I am in a crowded café awaiting my food-order. Walking past me on his way to a table is a man carrying a tray with several drinks on it. Just as he is about to sit down, my order is called. As I stand and move towards the counter (to collect my food), I knock the tray out of the man's hands with my hand. Did I do this intentionally? What is required for an action to be intentional?