Leprechaun
They do it every now and then if can catch him he will stop after a few seconds
Forum Discussion
Try temporarily storing the clover topiary. Once you put it back, while he may still be running, at that point you should be able to then tap him and get him back to his old self. I read on this forum that his non-stop zoominess is due to either neighbors tapping him while visiting, or exiting out of your Springfield while he's still running at full bore.
