Window hunting.

The nice thing about the place I'm in right now are the windows. There are lots. For an indoor cat, whose primary prey is inanimate, windows are cable TV. I sit in front of a pane of glass, and watch for interesting things to happen. Like this morning - SQUIRREL!! The tail starts to twitch, and then violently flick, the ears go up, and the squirrel is the only thing I see. I just imagine how I'd sneak up on that bastard, sneaking, sneaking, and then POUNCING!! right on him, then toying with him for a spell before killing him, and leaving him as a gift on someone's pillow.