Time to jump start this thread:
Bob was in his living room watching TV when there was a knock on the door. He opened the door and a 6-foot tall cockroach punched him in the face and Bob fell to the ground. When he came to, the cockroach was gone.
Bob took the episode as some sort of hallucination, but the next day the door bell rang and Bob opened it without hesitation. The giant cockroach clocked him between the eyes and then gave Bob a body shot for emphasis and once again Bob was on the ground only to have the behemoth cockroach vanish.
Next day, all Bob could think about was how he was going to get even with the cockroach if he showed up again, and sure enough, there was a rapping at Bob's door. This time he would take action. Bob grasped the doorknob and swung the door open, but before he could make a move, the monstrous cockroach was on him. This time he added a fierce kick to the shin and Bob was seriously injured while the roach was again nowhere to be found. Bob cried out in pain and his neighbor managed to summon an ambulance to get Bob to the emergency room.
The ER doc walked in to find a battered, bleeding Bob and immediately asked him how he received such injuries. Bob relayed the story of the thrice visiting cockroach and how he had been pummeled by the giant insect. Unsurprised, the doctor turned to Bob and said to him, "Yes, we were told that there was a nasty bug going around."