FIRST BLOOD
During the first movie, the homeless veteran John Rambo escapes from the police in the woods above the town. While the police prepare to chase him using all of their men, Rambo decides to defend himself.
The traps that Rambo sets up against the police are real Vietcong booby traps that can actually be set up in a hurry, just using a knife, a cord and some branches, which are the only objects Rambo had at his disposal in the movie.
During the Vietnam War, U.S. soldiers were trained to avoid these kinds of traps, but some special forces units – such as the SOG – were trained to set them up in a short amount of time, just like Stallone does in the movie.
In the drawing on the left, the so-called 'whip trap' . It can made using bamboo sticks or using a hard stick and one cord, as Rambo does.
In the movie, we don't see Rambo preparing it but its effects.
