Try hovering over items in the list below. Notice that the popup fades away if you move away from the list items or if you click anywhere outside of the popup. If you move over to the popup, the popup stays so that you can interact with the popup.
Cut-Me-Own-Throat Dibbler
Cohen the Barbarian
Lord Mortimer, Duke of Sto Helit
Twoflower
The Luggage
Rincewind