The body type which best survives trauma is at least moderately tattooed, including prison time marks, killer clown skulls, prison racial gang tats, and something on the hands. Much of the time, it is somewhat thin, but in a "ropy" or poorly nourished sense rather than a fit one. Missing, broken, eroded teeth are protective. Appearing at least 10 years older than stated age OR being a foulmouthed intoxicated punk are protective. Heavily tattooed dirty old abusive biker bastard is probably the overall safest way to be, extra credit if accompanied by scantily clad meth skank (double EC if you verbally abuse her while lying on the gurney).