remnant said:
Physics. Learn it.
the force a phone will generate falling to the ground is larger than the force you apply just holding it. Pretnding to throw it to the ground won't do much, because eventually you will decelerate.
Haha, what? You realize that for this work before your phone hits the ground, the "system" would have to deploy almost immediately after it senses an acceleration force above a certain threshold. How hard do you think it would be for a human arm to create a similar force on a tiny ass phone for a split second?
Unless of course you're talking about airbags that deploy
after your phone hits the ground, which is useless and is not what's being proposed here.