HOW IT WORKS | Bicycle helmet, Zippo lighter, Hugo Boss suits | Episode 21 | Free Documentary

How it Works - Episode 21
- Bicycle Helmet: It protects from the worst kind of injuries and yet it's pretty light.
- Zippo lighter: With a guarantee for live come these high-end-lighters
- Hugo Boss Suites: The suits from one of the most famous fashion designers in the world
- Ring donuts: The favourite food of Homer Simpson