Two bowling teams, one Swedish, one Norwegian, charter a double-decker bus for a weekend bowling tournament. The Swedish team rides on the bottom level of the bus, the Norwegian team rides on the top level.
The Swedish team, down below, is wooping it up and having a great time until one of them realizes he doesn't hear anything from the Norwegians upstairs. So, he decides to investigate.
When the Swede reaches the top, he finds the Norwegian team staring straight ahead at the road, frozen in fear, clutching the seats in front of them with white knuckles.
"What's going on up here?" asks the Swede. "We're having a great time downstairs!"
"Ya," screams a terrified Norwegian, "but you've got a driver!"