Greenbank's first experiment consists of placing one's finger against a table edge and smashing a tin can against it. . . ""Now, you see! Your are tougher than you thought""; it is the can that crushes, not the finger. If this is less than thrilling, remember than Greenbank is the author of the popular Book of Survival and Survival in the City as well as a former Outward Bound instructor, and is on the whole sensibly aware of the limitations of ""survival"" techniques. Fancy judo holds and advanced first aid are eschewed in favor of the advice to run away. . . and go for help whenever possible, but Greenbank does teach proper procedures for everything from bivouacing and signaling to how to behave in a burning building. Sometimes one wonders whether this is on the level: how can one practice with animal snares without actually killing animals? (Later Greenbank tells us what to do with any we bag ""accidentally."") But this manual seems destined to outlive such flimsier competition as Platt's Outdoor Survival (KR p. 399, J-133).