>>509170623
We've had them for decades, but we air drop ours. Who knows if theirs is accurate enough to work and the bouncing thing is china tier retarded.
https://www.youtube.com/watch?time_continue=8&v=QY904Uj859g&embeds_referring_euri=https%3A%2F%2Ffuturism.com%2F&source_ve_path=Mjg2NjY