A very small, mousy man was hired as a bartender in the Old West.
The saloon owner advised him, "If you ever hear that Big John is coming to town, drop everything and run for your life."
The bartender worked for six months with no problems. Then one day a cowboy rushed in shouting, "Big John's a-comin'!"
In his hurry to get out, he knocked the small bartender to the floor.