This IS brilliant. It’s a bike that is propelled by air.
Compressed air is pushed into this tank at the back. That air is then used to push the gear at the front of the bike just as water turns a water wheel or wind turns a wind turbine. The tank will move the bike 60km.
The girl riding the bike is the inventor. She watched how the bike mechanics used compressed air in the workshop which triggered the original idea.
Top marks for ingenuity, but a 1 out of 10 for health and safety 😉
More information can be found here.