What's with the "Push It" Videos?

Ok…I am going to sound really stupid here…what is with all the push it videos? Like the one Beatty and Wild Stangs did?

I found another one here:

Maybe it’s because I do not watch any TV, sports and consider myself sheltered… Was it a Super Bowl commerical or something?

It was a great Nextel commercial:

Whewwwww thanks for letting the cat out of the bag. I feel better now! And less stupider…