19 Inventions that will Save your Life!

Thinks it is a really important product since it extinguishes fires without going near them and triggers automatically.

A pendant that doubles as a slingshot projectile to smash car windows in an emergency.

A walking cane with a flashlight and a claimed million-volt taser, which he is sceptical about but which reviews suggest works.

A dental floss box hiding a Kevlar cable, plastic handcuff key and diamond wire for escaping captivity.

Considers it probably the coolest undercover self-defence tool thanks to its siren, camera and location sharing with police.

Impressed by a buoy that can carry two people and be driven to them from 500m away.

A cool concept that is only semi-proven and feels expensive for a magnet.

Likes the saw that stops and retracts the blade on contact with skin.

Surprised to see Wii remotes used to train medical students in keyhole surgery.

Describes a fast external fire-resistant elevator for evacuating tall buildings.

Calls the tube-shaped escape chute genius despite how it looks.

Likes Samsung's proof-of-concept truck screens that let drivers see through the truck to overtake safely, and hopes it succeeds.

Impressed by roller barriers that divert crash impact into forward momentum and keep roadsides visible.

Likes an exterior airbag that inflates before a side impact and cuts the force by 30%.

Thinks it will be a game changer for policing by restraining suspects without shooting them.

Very robust survival pods, though a niche product he doesn't expect many people to buy.

Says Japan's isolation layer lets buildings move with the quake and could cut deaths sharply.

Thinks the two-drone landmine clearing system could save thousands of lives and clear mines far faster than manual removal.

Sees DART as proof that humanity now has an anti-extinction weapon against asteroids.