From AMLopedia
The Sliding Penguins is very similar to the Sliding Brothers because they both involve SLIDING! The Sliding Penguins was done on a sloped lawn of an unoccupied house in Winter Creek Court. In order to do a Sliding Penguin, you have to start at the top of a lawn, run, then slide on your stomach.
The boys often made up skits in which their sliding would come in handy. They often imagined they were superheroes, and there was a robbery on the streets, so someone would call into their office, and they would have to slide down the lawn to get to the crime.