A man was sitting at home one evening, when the doorbell rang.
 
When he answered the door, a 6 foot tall cockroach was standing there. The cockroach immediately punched him between the eyes and scuttled off.

 

The next evening, the man was sitting at home when the doorbell  rang. When he answered the door, the cockroach was there again. This time, it punched him, kicked him and karate chopped him before scuttling away.

The third evening, the man was sitting at home when the doorbell rang again. When he answered the door, the cockroach was there yet again. It leapt at him and stabbed him several times before scuttling away. The gravely injured man managed to crawl to the telephone and called  an ambulance.  He was rushed to intensive care, where they just managed to save his life.
 
The next morning, the doctor was doing his rounds and he stopped to ask the man what had happened, so the man explained about the 6 foot cockroach's attacks, culminating in the near fatal stabbing.
 
 The doctor looked at him with sympathy and said, "Yes, there's a nasty bug going around."

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