A woman has a problem with her wardrobe door in the bedroom. Every time a bus passes outside the house, the door of the wardrobe would fall off.
She called a repairman to try and fix the problem. The repairman comes, and he sees that indeed the door did fall off every time a bus passed by.
“Okay!” said the repairman, “I’m going to step inside the wardrobe, you close the door behind me, ’til I see if I can detect what the problem is,” and he steps into the wardrobe. The wife closes the door behind him.
At this point, the husband suddenly arrives home and finds his wife in the bedroom talking to somebody.
He rushes upstairs, opens the wardrobe door, sees the repairman, and shouts, “What the hell are you doing in there?”
The repairman meekly replies,
“Well believe it or not, I’m waiting for a bus!”