The Nearer You Get to a Cop, the More You're Slip Sliding Away

The New Scientist introduces us to the "riot slimer"--a device that will allow cops to make any groups of people they don't want standing up, fall down, with air, water, and polyacrylamide powder, which together make a slippery, non-toxic goo.

Sounds like an improvement, at any rate, over such previous non-lethal weapons-against-the-people as tasers or the more recent "magnetic acoustic devices" (sound as a weapon--Kate Bush called it years ago) in terms of heinousness.