As a USDI-National Park Ranger I completed a 13-week POST Basic (Police) Academy in the late 1970s. Kurt Saxon was an instructor (sans a few fingers) who showed up one day with a high-powered German pellet gun and proceeded to show us how to kill humans by firing into a very large roast beef. He then cut open the roast to show the depth of penetration (simulating a human skull and brain). He had our undivided attention!
Another demonstration was how to clear a room or bar in 30 seconds with common household materials and so forth. His missing fingers only added to his credibility. The result was as if we had been allowed to peer into Pandora's box for a few minutes and then allowed to close the lid without long-term consequences.
For those with maturity, responsibility and long-term ethics, this is a guide on how to be aware of those around you. Just as Mentos and soft drinks are a current curiosity, Saxon tells you what to do and what to be aware of. Saxon speaks from first-hand experience in civil rights demonstrations. Read and enjoy, but be aware, not everyone is well intentioned . . .