Clinging
You can walk or crawl on walls and ceilings. You can stop at any point and stick to the surface without fear of falling. Neither feat requires a roll against Climbing skill, provided the surface is one you can cling to. Move while clinging is half your Basic Move.
If you are falling and try to grab a vertical surface to break your fall, the GM must first decide whether there is anything in reach. If there is, make a DX roll to touch the surface, and then make a ST roll at -1 per 5 yards already fallen. If you succeed, you stop your fall. Otherwise, you continue to fall – but you may subtract 5 yards from the height of the fall thanks to the slowing effect of the failed Clinging attempt. Variations in gravity affect these distances; e.g., in 0.5 G, the ST roll would be at -1 per 10 yards.
Special Limitations
Specific: You can only cling to a particular substance. Common materials, such as brick, metal, rock, or wood, are -40%; uncommon materials, such as adobe, ice, or rubber, are -60%; absurd materials, such as chocolate, are -80%.