It was designed as a public service announcement campaign by Metro Trains in Melbourne, Australia, to promote rail safety. The video went viral through sharing and social media starting in November 2012. Since then it has spawned more songs, a considerable number of parodies, video games and, believe it or not, a couple of ESL lesson plans!
The following lesson plan is a combination of what circulates on the Internet (a version that works best with my classes). Ideal for older children and young teens. Level B1, mainly due to its vocabulary (although it becomes self explanatory through the video)