Have you seen this clip? It's so cute and catchy. I keep humming the tune throughout the day. It's actually a public safety ad by Metro Trains in Melbourne to promote rail safety. Dumb things you shouldn't do that may inadvertently lead to your death. The clip makes you want to sing-along despite the grotesque deaths of its adorable characters. With countless parodies on youtube and 30 million views and counting, I think it's a pretty effective ad. What do you think?