Here’s an Internet classic: How to change the fan belt on a Type 1 Volkswagen Beetle. In five seconds. With the engine running. Watch this—and don’t blink or you’ll miss it.
First: Do not attempt this at home. This is not a prescribed factory service procedure. It may look easy, but you could lose a couple of fingers faster than you can say fahrvergnügen. This stunt is for highly skilled web mechanics only.
Among other things, the video illustrates the pure mechanical simplicity that was the original Volkswagen Beetle. You’re lucky if you can see the accessory belts on a 2014 automobile with the naked eye, let alone change them with common hand tools. Here the only tool required is an ordinary flat-blade screwdriver, and the engine remains running through the entire process. Watch this.