http://ruckus.org/article.php?list=type&type=9
How to Hang Yourself From an Urban Structure
A good activist is a living activist.

DISCLAIMER—this is a basic guideline for how to create the image of a hang man from a company sign (generally oil companies). Only an EXPERIENCED climber can comprehend and practice this form of direct action, and even then only with extensive training. Rock-climbers, mountaineers, and activists with the desire but not the experience DO NOT QUALIFY to try this activity. Only people who have years of urban, direct action, aid climbing should even consider training for this. You WILL get hurt if attempting this without proper training, setting the movement for social justice, environmental security and human rights back in the eyes of the world. Have respect for your fellow activists and the movement at large, by knowing your own limits.

INSTRUCTIONS

1 seat harness
1 chest harness
3 locking carabiners
2 short slings
2 regular slings
1 rope tied as a noose with tape
1 ladder

The activist uses a seat and chest harness, each are equipped with one locking carabiner. A short sling runs between the two carabiners (length will change due to individual height), locked into both. The chest harness allows you to position yourself upright and provide a higher tie-in point, although the chest harness should not take any weight. The weight extends down to the seat harness through the short sling. The actual system that runs between the climber and the pole is through the chest harness. This tie in point is set as high as is comfortable on the chest harness, thus allowing the body to hang almost vertical if the climber stiffens himself. A short sling is locked into the chest harness locking carabiner, with another locking carabiner attatched to the other end. This carabiner is the clip in point for the sling that is girth-hitched around the sign post. Be sure to use a tapered pole. This allows the girth hitch to catch and hold without slipping. That is your primary safety, but as a back up, another sling is girth-hitched near the primary and attached, with minimal slack, to the seat harness locking carabiner. Noose The noose itself has one end thrown over the top of the sign, without actually being tied to it. The other end is around the climbers neck. Though it looks whole, it has been cut and taped back together in the loop that circles the neck, so that if it does catch on something, it won’t be functional. A loose t-shirt can be worn to hide the whole climbing system. The sign is accessed from a ladder and once hanging comfortably and safely, the ladder is removed from the scene. The use of the chest harness makes hanging vertically easier. However, the blood circulation to the legs is still poor, and occasionally the climber will need to sit down. Padding the seat harness will make the experience more comfortable for the climberSeat and Chest HarnessNoose