If I watch this ball long enough...

it's bound to make a run for it!  Woof! 
Alfred Dog :-)

Alfred will sit for five minutes or more just staring at his ball waiting for it to move - he'd probably sit staring at it for longer, but I can't let him just wait knowing there's no hope of it trying to escape, so I give it a discrete nudge with my foot to help it on it's way!