One night, as he finished his last beer, Joe's doorbell rang. He answered the door and found a six-foot cockroach standing there. The bug grabbed him by the collar and threw him across the room, then left.

The next night, the doorbell rang, and found the same six-foot cockroach standing there. The big bug punched him in the stomach, then left.

The same same happened the next night. This time, he was kneed in the groin and hit behind the ear as he doubled over in pain. Then the big bug left.

The following day, Joe went to see his doctor. He explained the events of the preceding four nights. "What can I do?" he pleaded.

"Not much" the doctor replied. "There's just a nasty bug going around."