Ok this video's description sets the scene better than I can hope to. So here:
"My 4 year old woke up from his nap and had his new steelers jump suit on backwards. Little did he and his sister know that this style was already created years before their birth. Here's a small clip of their first encounter with "jump"!"
That 4 year old kid was born 15 years after the song Jump debuted. In case you wanted to feel super-old today.