Crazy Frog is one of the most popular videos ever on YouTube, with more than 4 billion views. Could it be that half the people on the planet have seen this video? Not yet. It turns out that many people watch it over and over. Still, I’ll bet more than seven in eight have not seen this. If you’re one who has seen it, you may enjoy watching it again.

You may be wondering what he’s doing with his hands. You’ll see he’s doing a twisting motion with his right hand, and a squeezing motion with his left. He’s operating a motorcycle. The right is turning the throttle, and the left is operating the clutch of a bike with a manual transmission. You may see him shift gears with a foot also.

What’s with the onomatopoeia at the beginning of the video? For that matter, what’s onomatopoeia? That’s the act of making sounds with ones mouth that imitate sounds made elsewhere such as by machines. It turns out our little froggie man is emulating the sounds of an old two-stroke motorcycle. Until the past 20 or 30 years, a good many of the world’s motorcycles had two-stroke engines that don’t burn gas as efficiently as modern four-strokes. When idling or decelerating unburned gas gathers in the mufflers of these bikes and catches fire or explodes from time to time, sounding much like Crazy Frog. Here’s an earlier video of him that focuses more on his motorcycling: